I just did a test, could not reproduce this issue. Maybe your usb storage consumes too much power, could you please change other usb sticks to redo the test?


on the usb-serial console, my Wifi is enabled and ping a website:
ubuntu@ubuntu:~$ uname -a
Linux ubuntu 5.3.0-1017-raspi2 #19+otg SMP Wed Jan 29 12:45:11 CST 2020 aarch64 aarch64 aarch64 GNU/Linux
ubuntu@ubuntu:~$ ifconfig
lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 10  bytes 842 (842.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 10  bytes 842 (842.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.2.104  netmask 255.255.255.0  broadcast 192.168.2.255
        inet6 fe80::dea6:32ff:fe0e:9bc5  prefixlen 64  scopeid 0x20<link>
        ether dc:a6:32:0e:9b:c5  txqueuelen 1000  (Ethernet)
        RX packets 58  bytes 7614 (7.6 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 69  bytes 7950 (7.9 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

ubuntu@ubuntu:~$ ping www.sohu.com
PING fbx.a.sohu.com (123.126.104.68) 56(84) bytes of data.
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=1 ttl=57 time=10.4 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=2 ttl=57 time=6.75 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=3 ttl=57 time=4.80 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=4 ttl=57 time=17.3 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=5 ttl=57 time=5.55 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=6 ttl=57 time=5.24 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=7 ttl=57 time=5.08 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=8 ttl=57 time=6.37 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=9 ttl=57 time=6.56 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=10 ttl=57 time=4.25 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=11 ttl=57 time=7.62 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=12 ttl=57 time=4.09 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=13 ttl=57 time=7.59 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=14 ttl=57 time=7.78 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=15 ttl=57 time=6.42 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=16 ttl=57 time=4.29 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=17 ttl=57 time=4.03 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=18 ttl=57 time=4.06 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=19 ttl=57 time=13.3 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=20 ttl=57 time=4.16 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=21 ttl=57 time=11.1 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=22 ttl=57 time=6.45 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=23 ttl=57 time=5.60 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=24 ttl=57 time=3.86 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=25 ttl=57 time=5.81 ms
64 bytes from 123.126.104.68 (123.126.104.68): icmp_seq=26 ttl=57 time=6.88 ms
,,,,



On a console via ssh, we can see a usb stick is plugged into the usb3 and mount it to /mnt/
[  142.964958] usb 1-1.2: new high-speed USB device number 3 using xhci_hcd
[  143.065593] usb 1-1.2: New USB device found, idVendor=0781, idProduct=5575, bcdDevice= 1.27
[  143.065609] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  143.065620] usb 1-1.2: Product: Cruzer Glide
[  143.065631] usb 1-1.2: Manufacturer: SanDisk
[  143.065640] usb 1-1.2: SerialNumber: 20043109300EAD30F6EF
[  143.117186] usb-storage 1-1.2:1.0: USB Mass Storage device detected
[  143.119025] scsi host0: usb-storage 1-1.2:1.0
[  143.119391] usbcore: registered new interface driver usb-storage
[  143.124401] usbcore: registered new interface driver uas
[  144.130229] scsi 0:0:0:0: Direct-Access     SanDisk  Cruzer Glide     1.27 PQ: 0 ANSI: 6
[  144.131441] sd 0:0:0:0: Attached scsi generic sg0 type 0
[  144.132701] sd 0:0:0:0: [sda] 15223808 512-byte logical blocks: (7.79 GB/7.26 GiB)
[  144.134146] sd 0:0:0:0: [sda] Write Protect is off
[  144.134161] sd 0:0:0:0: [sda] Mode Sense: 43 00 00 00
[  144.134745] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[  144.152487]  sda: sda1
[  144.156442] sd 0:0:0:0: [sda] Attached SCSI removable disk
^C
ubuntu@ubuntu:~$ sudo mount /dev/sda
sda   sda1  
ubuntu@ubuntu:~$ sudo mount /dev/sda1 /mnt/
ubuntu@ubuntu:~$ ls /mnt/
'1 Unit 1.mp3'   2.nsh        EFIFlash.efi   Fpt.efi                                                                 M.nsh   SKL_DT_AIO_RVP_KSC_v01_04.bin  'System Volume Information'   fparts.txt
 1.nsh           BOOTEX.LOG   FCNTRL.BIN     KBL_DT_RVP8_DSTEP_Prod_SATA_NOPTT_CONS_IFWI_BIOS_33_3_ME_1040_Ext.bin   R.nsh   STARTUP.NSH                     eeupdate64e.efi              map