Copy multiple files to usb stick fails

[rocknroll]

Hello,

When copying several files (20 files, 350 MB each) from my internal hard drive to usb stick (having enough free space) using Dolphin, only the first file is copied, and then the progress bar just hangs and the other files are not copied.

If I try to copy the containing folder (with all the files inside) instead, it is the same behavior, the copy just stops after one file.

If I copy the files one by one, it works.

I would expect that the files are all copied to the usb stick.

Tyring from a Mac to copy several files to the usb stick, it works.

I am using KUbuntu.

Here are some system information:

cyril@miniseeker:~$ lsb_release -rd
Description: Ubuntu 12.04.4 LTS
Release: 12.04

cyril@miniseeker:~$ apt-cache policy dolphin
dolphin:
  Installed: 4:4.8.5-0ubuntu0.1
  Candidate: 4:4.8.5-0ubuntu0.1
  Version table:
 *** 4:4.8.5-0ubuntu0.1 0
        500 http://fr.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     4:4.8.2-0ubuntu2 0
        500 http://fr.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages

cyril@miniseeker:/etc/apache2/sites-enabled$ sudo lsusb -v

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Device Descriptor:
  bLength 18
  bDescriptorType 1
  bcdUSB 2.00
  bDeviceClass 9 Hub
  bDeviceSubClass 0 Unused
  bDeviceProtocol 0 Full speed (or root) hub
  bMaxPacketSize0 64
  idVendor 0x1d6b Linux Foundation
  idProduct 0x0002 2.0 root hub
  bcdDevice 3.02
  iManufacturer 3 Linux 3.2.0-60-generic ehci_hcd
  iProduct 2 EHCI Host Controller
  iSerial 1 0000:00:1a.0
  bNumConfigurations 1
  Configuration Descriptor:
    bLength 9
    bDescriptorType 2
    wTotalLength 25
    bNumInterfaces 1
    bConfigurationValue 1
    iConfiguration 0
    bmAttributes 0xe0
      Self Powered
      Remote Wakeup
    MaxPower 0mA
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 0
      bAlternateSetting 0
      bNumEndpoints 1
      bInterfaceClass 9 Hub
      bInterfaceSubClass 0 Unused
      bInterfaceProtocol 0 Full speed (or root) hub
      iInterface 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x81 EP 1 IN
        bmAttributes 3
          Transfer Type Interrupt
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0004 1x 4 bytes
        bInterval 12
Hub Descriptor:
  bLength 9
  bDescriptorType 41
  nNbrPorts 2
  wHubCharacteristic 0x000a
    No power switching (usb 1.0)
    Per-port overcurrent protection
  bPwrOn2PwrGood 10 * 2 milli seconds
  bHubContrCurrent 0 milli Ampere
  DeviceRemovable 0x00
  PortPwrCtrlMask 0xff
 Hub Port Status:
   Port 1: 0000.0503 highspeed power enable connect
   Port 2: 0000.0100 power
Device Status: 0x0001
  Self Powered

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Device Descriptor:
  bLength 18
  bDescriptorType 1
  bcdUSB 2.00
  bDeviceClass 9 Hub
  bDeviceSubClass 0 Unused
  bDeviceProtocol 0 Full speed (or root) hub
  bMaxPacketSize0 64
  idVendor 0x1d6b Linux Foundation
  idProduct 0x0002 2.0 root hub
  bcdDevice 3.02
  iManufacturer 3 Linux 3.2.0-60-generic ehci_hcd
  iProduct 2 EHCI Host Controller
  iSerial 1 0000:00:1d.0
  bNumConfigurations 1
  Configuration Descriptor:
    bLength 9
    bDescriptorType 2
    wTotalLength 25
    bNumInterfaces 1
    bConfigurationValue 1
    iConfiguration 0
    bmAttributes 0xe0
      Self Powered
      Remote Wakeup
    MaxPower 0mA
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 0
      bAlternateSetting 0
      bNumEndpoints 1
      bInterfaceClass 9 Hub
      bInterfaceSubClass 0 Unused
      bInterfaceProtocol 0 Full speed (or root) hub
      iInterface 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x81 EP 1 IN
        bmAttributes 3
          Transfer Type Interrupt
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0004 1x 4 bytes
        bInterval 12
Hub Descriptor:
  bLength 9
  bDescriptorType 41
  nNbrPorts 2
  wHubCharacteristic 0x000a
    No power switching (usb 1.0)
    Per-port overcurrent protection
  bPwrOn2PwrGood 10 * 2 milli seconds
  bHubContrCurrent 0 milli Ampere
  DeviceRemovable 0x00
  PortPwrCtrlMask 0xff
 Hub Port Status:
   Port 1: 0000.0507 highspeed power suspend enable connect
   Port 2: 0000.0100 power
Device Status: 0x0001
  Self Powered

Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Device Descriptor:
  bLength 18
  bDescriptorType 1
  bcdUSB 2.00
  bDeviceClass 9 Hub
  bDeviceSubClass 0 Unused
  bDeviceProtocol 1 Single TT
  bMaxPacketSize0 64
  idVendor 0x8087 Intel Corp.
  idProduct 0x0024 Integrated Rate Matching Hub
  bcdDevice 0.00
  iManufacturer 0
  iProduct 0
  iSerial 0
  bNumConfigurations 1
  Configuration Descriptor:
    bLength 9
    bDescriptorType 2
    wTotalLength 25
    bNumInterfaces 1
    bConfigurationValue 1
    iConfiguration 0
    bmAttributes 0xe0
      Self Powered
      Remote Wakeup
    MaxPower 0mA
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 0
      bAlternateSetting 0
      bNumEndpoints 1
      bInterfaceClass 9 Hub
      bInterfaceSubClass 0 Unused
      bInterfaceProtocol 0 Full speed (or root) hub
      iInterface 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x81 EP 1 IN
        bmAttributes 3
          Transfer Type Interrupt
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0001 1x 1 bytes
        bInterval 12
Hub Descriptor:
  bLength 9
  bDescriptorType 41
  nNbrPorts 6
  wHubCharacteristic 0x0009
    Per-port power switching
    Per-port overcurrent protection
    TT think time 8 FS bits
  bPwrOn2PwrGood 50 * 2 milli seconds
  bHubContrCurrent 0 milli Ampere
  DeviceRemovable 0x00
  PortPwrCtrlMask 0xff
 Hub Port Status:
   Port 1: 0000.0100 power
   Port 2: 0000.0503 highspeed power enable connect
   Port 3: 0000.0100 power
   Port 4: 0000.0100 power
   Port 5: 0000.0100 power
   Port 6: 0000.0100 power
Device Qualifier (for other device speed):
  bLength 10
  bDescriptorType 6
  bcdUSB 2.00
  bDeviceClass 9 Hub
  bDeviceSubClass 0 Unused
  bDeviceProtocol 0 Full speed (or root) hub
  bMaxPacketSize0 64
  bNumConfigurations 1
Device Status: 0x0001
  Self Powered

Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Device Descriptor:
  bLength 18
  bDescriptorType 1
  bcdUSB 2.00
  bDeviceClass 9 Hub
  bDeviceSubClass 0 Unused
  bDeviceProtocol 1 Single TT
  bMaxPacketSize0 64
  idVendor 0x8087 Intel Corp.
  idProduct 0x0024 Integrated Rate Matching Hub
  bcdDevice 0.00
  iManufacturer 0
  iProduct 0
  iSerial 0
  bNumConfigurations 1
  Configuration Descriptor:
    bLength 9
    bDescriptorType 2
    wTotalLength 25
    bNumInterfaces 1
    bConfigurationValue 1
    iConfiguration 0
    bmAttributes 0xe0
      Self Powered
      Remote Wakeup
    MaxPower 0mA
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 0
      bAlternateSetting 0
      bNumEndpoints 1
      bInterfaceClass 9 Hub
      bInterfaceSubClass 0 Unused
      bInterfaceProtocol 0 Full speed (or root) hub
      iInterface 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x81 EP 1 IN
        bmAttributes 3
          Transfer Type Interrupt
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0001 1x 1 bytes
        bInterval 12
Hub Descriptor:
  bLength 9
  bDescriptorType 41
  nNbrPorts 6
  wHubCharacteristic 0x0009
    Per-port power switching
    Per-port overcurrent protection
    TT think time 8 FS bits
  bPwrOn2PwrGood 50 * 2 milli seconds
  bHubContrCurrent 0 milli Ampere
  DeviceRemovable 0x00
  PortPwrCtrlMask 0xff
 Hub Port Status:
   Port 1: 0000.0100 power
   Port 2: 0000.0100 power
   Port 3: 0000.0100 power
   Port 4: 0000.0100 power
   Port 5: 0000.0100 power
   Port 6: 0000.0507 highspeed power suspend enable connect
Device Qualifier (for other device speed):
  bLength 10
  bDescriptorType 6
  bcdUSB 2.00
  bDeviceClass 9 Hub
  bDeviceSubClass 0 Unused
  bDeviceProtocol 0 Full speed (or root) hub
  bMaxPacketSize0 64
  bNumConfigurations 1
Device Status: 0x0001
  Self Powered

Bus 002 Device 003: ID 5986:0315 Acer, Inc
Device Descriptor:
  bLength 18
  bDescriptorType 1
  bcdUSB 2.00
  bDeviceClass 239 Miscellaneous Device
  bDeviceSubClass 2 ?
  bDeviceProtocol 1 Interface Association
  bMaxPacketSize0 64
  idVendor 0x5986 Acer, Inc
  idProduct 0x0315
  bcdDevice 6.08
  iManufacturer 2 BISON Corporation
  iProduct 3 BisonCam, NB Pro
  iSerial 0
  bNumConfigurations 1
  Configuration Descriptor:
    bLength 9
    bDescriptorType 2
    wTotalLength 507
    bNumInterfaces 2
    bConfigurationValue 1
    iConfiguration 0
    bmAttributes 0x80
      (Bus Powered)
    MaxPower 200mA
    Interface Association:
      bLength 8
      bDescriptorType 11
      bFirstInterface 0
      bInterfaceCount 2
      bFunctionClass 14 Video
      bFunctionSubClass 3 Video Interface Collection
      bFunctionProtocol 0
      iFunction 1 BisonCam, NB Pro
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 0
      bAlternateSetting 0
      bNumEndpoints 1
      bInterfaceClass 14 Video
      bInterfaceSubClass 1 Video Control
      bInterfaceProtocol 0
      iInterface 1 BisonCam, NB Pro
      VideoControl Interface Descriptor:
        bLength 13
        bDescriptorType 36
        bDescriptorSubtype 1 (HEADER)
        bcdUVC 1.00
        wTotalLength 105
        dwClockFrequency 60.000000MHz
        bInCollection 1
        baInterfaceNr( 0) 1
      VideoControl Interface Descriptor:
        bLength 9
        bDescriptorType 36
        bDescriptorSubtype 3 (OUTPUT_TERMINAL)
        bTerminalID 4
        wTerminalType 0x0101 USB Streaming
        bAssocTerminal 0
        bSourceID 2
        iTerminal 0
      VideoControl Interface Descriptor:
        bLength 27
        bDescriptorType 36
        bDescriptorSubtype 6 (EXTENSION_UNIT)
        bUnitID 2
        guidExtensionCode {0b365d5e-5fe4-8145-9b0b-374669ba05d4}
        bNumControl 16
        bNrPins 1
        baSourceID( 0) 5
        bControlSize 2
        bmControls( 0) 0xff
        bmControls( 1) 0x00
        iExtension 0
      VideoControl Interface Descriptor:
        bLength 27
        bDescriptorType 36
        bDescriptorSubtype 6 (EXTENSION_UNIT)
        bUnitID 5
        guidExtensionCode {03dfdaec-e38f-274d-893b-a18d25aeee09}
        bNumControl 16
        bNrPins 1
        baSourceID( 0) 3
        bControlSize 2
        bmControls( 0) 0xff
        bmControls( 1) 0x03
        iExtension 0
      VideoControl Interface Descriptor:
        bLength 18
        bDescriptorType 36
        bDescriptorSubtype 2 (INPUT_TERMINAL)
        bTerminalID 1
        wTerminalType 0x0201 Camera Sensor
        bAssocTerminal 0
        iTerminal 0
        wObjectiveFocalLengthMin 0
        wObjectiveFocalLengthMax 0
        wOcularFocalLength 0
        bControlSize 3
        bmControls 0x00000000
      VideoControl Interface Descriptor:
        bLength 11
        bDescriptorType 36
        bDescriptorSubtype 5 (PROCESSING_UNIT)
      Warning: Descriptor too short
        bUnitID 3
        bSourceID 1
        wMaxMultiplier 0
        bControlSize 2
        bmControls 0x0000043f
          Brightness
          Contrast
          Hue
          Saturation
          Sharpness
          Gamma
          Power Line Frequency
        iProcessing 0
        bmVideoStandards 0x6f
          None
          NTSC - 525/60
          PAL - 625/50
          SECAM - 625/50
          PAL - 525/60
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x83 EP 3 IN
        bmAttributes 3
          Transfer Type Interrupt
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0017 1x 23 bytes
        bInterval 6
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 1
      bAlternateSetting 0
      bNumEndpoints 0
      bInterfaceClass 14 Video
      bInterfaceSubClass 2 Video Streaming
      bInterfaceProtocol 0
      iInterface 0
      VideoStreaming Interface Descriptor:
        bLength 14
        bDescriptorType 36
        bDescriptorSubtype 1 (INPUT_HEADER)
        bNumFormats 1
        wTotalLength 291
        bEndPointAddress 129
        bmInfo 0
        bTerminalLink 4
        bStillCaptureMethod 2
        bTriggerSupport 1
        bTriggerUsage 1
        bControlSize 1
        bmaControls( 0) 27
      VideoStreaming Interface Descriptor:
        bLength 27
        bDescriptorType 36
        bDescriptorSubtype 4 (FORMAT_UNCOMPRESSED)
        bFormatIndex 1
        bNumFrameDescriptors 7
        guidFormat {59555932-0000-1000-8000-00aa00389b71}
        bBitsPerPixel 16
        bDefaultFrameIndex 1
        bAspectRatioX 0
        bAspectRatioY 0
        bmInterlaceFlags 0x00
          Interlaced stream or variable: No
          Fields per frame: 2 fields
          Field 1 first: No
          Field pattern: Field 1 only
          bCopyProtect 0
      VideoStreaming Interface Descriptor:
        bLength 30
        bDescriptorType 36
        bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
        bFrameIndex 1
        bmCapabilities 0x00
          Still image unsupported
        wWidth 640
        wHeight 480
        dwMinBitRate 18432000
        dwMaxBitRate 18432000
        dwMaxVideoFrameBufferSize 614400
        dwDefaultFrameInterval 416666
        bFrameIntervalType 1
        dwFrameInterval( 0) 416666
      VideoStreaming Interface Descriptor:
        bLength 30
        bDescriptorType 36
        bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
        bFrameIndex 2
        bmCapabilities 0x00
          Still image unsupported
        wWidth 160
        wHeight 120
        dwMinBitRate 1152000
        dwMaxBitRate 1152000
        dwMaxVideoFrameBufferSize 38400
        dwDefaultFrameInterval 333333
        bFrameIntervalType 1
        dwFrameInterval( 0) 333333
      VideoStreaming Interface Descriptor:
        bLength 30
        bDescriptorType 36
        bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
        bFrameIndex 3
        bmCapabilities 0x00
          Still image unsupported
        wWidth 176
        wHeight 144
        dwMinBitRate 1520640
        dwMaxBitRate 1520640
        dwMaxVideoFrameBufferSize 50688
        dwDefaultFrameInterval 333333
        bFrameIntervalType 1
        dwFrameInterval( 0) 333333
      VideoStreaming Interface Descriptor:
        bLength 30
        bDescriptorType 36
        bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
        bFrameIndex 4
        bmCapabilities 0x00
          Still image unsupported
        wWidth 320
        wHeight 240
        dwMinBitRate 4608000
        dwMaxBitRate 4608000
        dwMaxVideoFrameBufferSize 153600
        dwDefaultFrameInterval 333333
        bFrameIntervalType 1
        dwFrameInterval( 0) 333333
      VideoStreaming Interface Descriptor:
        bLength 30
        bDescriptorType 36
        bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
        bFrameIndex 5
        bmCapabilities 0x00
          Still image unsupported
        wWidth 352
        wHeight 288
        dwMinBitRate 6082560
        dwMaxBitRate 6082560
        dwMaxVideoFrameBufferSize 202752
        dwDefaultFrameInterval 333333
        bFrameIntervalType 1
        dwFrameInterval( 0) 333333
      VideoStreaming Interface Descriptor:
        bLength 30
        bDescriptorType 36
        bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
        bFrameIndex 6
        bmCapabilities 0x00
          Still image unsupported
        wWidth 1280
        wHeight 1024
        dwMinBitRate 23592960
        dwMaxBitRate 23592960
        dwMaxVideoFrameBufferSize 2621440
        dwDefaultFrameInterval 1333333
        bFrameIntervalType 1
        dwFrameInterval( 0) 1333333
      VideoStreaming Interface Descriptor:
        bLength 30
        bDescriptorType 36
        bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
        bFrameIndex 7
        bmCapabilities 0x00
          Still image unsupported
        wWidth 640
        wHeight 480
        dwMinBitRate 18432000
        dwMaxBitRate 18432000
        dwMaxVideoFrameBufferSize 614400
        dwDefaultFrameInterval 416666
        bFrameIntervalType 1
        dwFrameInterval( 0) 416666
      VideoStreaming Interface Descriptor:
        bLength 34
        bDescriptorType 36
        bDescriptorSubtype 3 (STILL_IMAGE_FRAME)
        bEndpointAddress 0
        bNumImageSizePatterns 7
        wWidth( 0) 640
        wHeight( 0) 480
        wWidth( 1) 160
        wHeight( 1) 120
        wWidth( 2) 176
        wHeight( 2) 144
        wWidth( 3) 320
        wHeight( 3) 240
        wWidth( 4) 352
        wHeight( 4) 288
        wWidth( 5) 1280
        wHeight( 5) 1024
        wWidth( 6) 640
        wHeight( 6) 480
        bNumCompressionPatterns 7
      VideoStreaming Interface Descriptor:
        bLength 6
        bDescriptorType 36
        bDescriptorSubtype 13 (COLORFORMAT)
        bColorPrimaries 1 (BT.709,sRGB)
        bTransferCharacteristics 1 (BT.709)
        bMatrixCoefficients 4 (SMPTE 170M (BT.601))
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 1
      bAlternateSetting 1
      bNumEndpoints 1
      bInterfaceClass 14 Video
      bInterfaceSubClass 2 Video Streaming
      bInterfaceProtocol 0
      iInterface 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x81 EP 1 IN
        bmAttributes 5
          Transfer Type Isochronous
          Synch Type Asynchronous
          Usage Type Data
        wMaxPacketSize 0x1400 3x 1024 bytes
        bInterval 1
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 1
      bAlternateSetting 2
      bNumEndpoints 1
      bInterfaceClass 14 Video
      bInterfaceSubClass 2 Video Streaming
      bInterfaceProtocol 0
      iInterface 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x81 EP 1 IN
        bmAttributes 5
          Transfer Type Isochronous
          Synch Type Asynchronous
          Usage Type Data
        wMaxPacketSize 0x0400 1x 1024 bytes
        bInterval 1
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 1
      bAlternateSetting 3
      bNumEndpoints 1
      bInterfaceClass 14 Video
      bInterfaceSubClass 2 Video Streaming
      bInterfaceProtocol 0
      iInterface 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x81 EP 1 IN
        bmAttributes 5
          Transfer Type Isochronous
          Synch Type Asynchronous
          Usage Type Data
        wMaxPacketSize 0x0c00 2x 1024 bytes
        bInterval 1
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 1
      bAlternateSetting 4
      bNumEndpoints 1
      bInterfaceClass 14 Video
      bInterfaceSubClass 2 Video Streaming
      bInterfaceProtocol 0
      iInterface 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x81 EP 1 IN
        bmAttributes 5
          Transfer Type Isochronous
          Synch Type Asynchronous
          Usage Type Data
        wMaxPacketSize 0x0000 1x 0 bytes
        bInterval 1
Device Qualifier (for other device speed):
  bLength 10
  bDescriptorType 6
  bcdUSB 2.00
  bDeviceClass 239 Miscellaneous Device
  bDeviceSubClass 2 ?
  bDeviceProtocol 1 Interface Association
  bMaxPacketSize0 64
  bNumConfigurations 1
Device Status: 0x0000
  (Bus Powered)

Bus 001 Device 003: ID 13fe:4100 Kingston Technology Company Inc.
Device Descriptor:
  bLength 18
  bDescriptorType 1
  bcdUSB 2.00
  bDeviceClass 0 (Defined at Interface level)
  bDeviceSubClass 0
  bDeviceProtocol 0
  bMaxPacketSize0 64
  idVendor 0x13fe Kingston Technology Company Inc.
  idProduct 0x4100
  bcdDevice 1.00
  iManufacturer 1
  iProduct 2 USB DISK 2.0
  iSerial 3 070131ECB6655B96
  bNumConfigurations 1
  Configuration Descriptor:
    bLength 9
    bDescriptorType 2
    wTotalLength 32
    bNumInterfaces 1
    bConfigurationValue 1
    iConfiguration 0
    bmAttributes 0x80
      (Bus Powered)
    MaxPower 200mA
    Interface Descriptor:
      bLength 9
      bDescriptorType 4
      bInterfaceNumber 0
      bAlternateSetting 0
      bNumEndpoints 2
      bInterfaceClass 8 Mass Storage
      bInterfaceSubClass 6 SCSI
      bInterfaceProtocol 80 Bulk-Only
      iInterface 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x81 EP 1 IN
        bmAttributes 2
          Transfer Type Bulk
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0200 1x 512 bytes
        bInterval 0
      Endpoint Descriptor:
        bLength 7
        bDescriptorType 5
        bEndpointAddress 0x02 EP 2 OUT
        bmAttributes 2
          Transfer Type Bulk
          Synch Type None
          Usage Type Data
        wMaxPacketSize 0x0200 1x 512 bytes
        bInterval 0
Device Qualifier (for other device speed):
  bLength 10
  bDescriptorType 6
  bcdUSB 2.00
  bDeviceClass 0 (Defined at Interface level)
  bDeviceSubClass 0
  bDeviceProtocol 0
  bMaxPacketSize0 64
  bNumConfigurations 1
Device Status: 0x0000
  (Bus Powered)

[rocknroll (rocknrocknroll)]

Please find attach a screenshot:
I am copying 2 files around 350 MB each.
On the screenshot, you can see it is at 50% done. It would just stay stuck like this for ever.

[rocknroll (rocknrocknroll)]

Ok, this is not a bug actually... the files continue to be copied, it is just the progress bar which is stuck for a while between files, giving the impression that it is stucked. You can close it!