Disk Capacity Does Not Show All Storage Space

[Alan Diggs]

There are currently six storage devices attached to my machine, all of which get activated and mounted on boot. The primary being the 250GB NVMe device the OS is installed and run on, the secondary being a 2TB software RAID of 4x500GB disks, and the third being a 5TB USB-connected WD portable HDD. All of these are given mountpoints via the system fstab, but only a portion of the available disk space appears to be shown in Settings. 2.3TB as opposed to the actual ~7TB.

Installed 1:3.36.0-0ubuntu2

Here's a `df` of my mounts, excluding loops and tmps:
```
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/nvme0n1p3 234375168 75058756 157696300 33% /
/dev/nvme0n1p3 234375168 75058756 157696300 33% /home
/dev/nvme0n1p2 968312 146420 755488 17% /boot
/dev/nvme0n1p1 997456 7980 989476 1% /boot/efi
/dev/sda 1953546336 49408652 1903183076 3% /mnt/storageRAID
/dev/sdd 4883737600 306627148 4576010100 7% /mnt/Archive
```

I've also attached a screenshot of what Settings displays.

`inxi -Fxzc0`:
```
System: Kernel: 5.4.0-18-generic x86_64 bits: 64 compiler: gcc v: 9.2.1 Desktop: Gnome 3.35.91
           Distro: Ubuntu 20.04 LTS (Focal Fossa)
Machine: Type: Desktop Mobo: ASUSTeK model: PRIME B350-PLUS v: Rev X.0x serial: <filter>
           UEFI: American Megatrends v: 5407 date: 12/31/2019
CPU: Topology: 8-Core model: AMD Ryzen 7 2700 bits: 64 type: MT MCP arch: Zen+ rev: 2
           L2 cache: 4096 KiB
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm bogomips: 108800
           Speed: 1377 MHz min/max: 1550/3400 MHz Core speeds (MHz): 1: 1376 2: 1374 3: 1373 4: 1377
           5: 1378 6: 1374 7: 1377 8: 1378 9: 1377 10: 1376 11: 1377 12: 1377 13: 1375 14: 1374
           15: 1371 16: 1377
Graphics: Device-1: AMD Navi 10 [Radeon RX 5600 OEM/5600 XT / 5700/5700 XT] vendor: XFX Pine
           driver: amdgpu v: kernel bus ID: 0c:00.0
           Display: x11 server: X.Org 1.20.7 driver: amdgpu resolution: 3840x1080~144Hz
           OpenGL: renderer: AMD NAVI10 (DRM 3.35.0 5.4.0-18-generic LLVM 9.0.1) v: 4.6 Mesa 20.0.0
           direct render: Yes
Audio: Device-1: Creative Labs Sound Core3D [Sound Blaster Recon3D / Z-Series]
           driver: snd_hda_intel v: kernel bus ID: 09:00.0
           Device-2: AMD Navi 10 HDMI Audio driver: snd_hda_intel v: kernel bus ID: 0c:00.1
           Device-3: AMD Family 17h HD Audio vendor: ASUSTeK driver: snd_hda_intel v: kernel
           bus ID: 0e:00.3
           Device-4: Logitech HD Pro Webcam C920 type: USB driver: snd-usb-audio,uvcvideo
           bus ID: 3-1.3:3
           Device-5: C-Media Blue Snowball type: USB driver: hid-generic,snd-usb-audio,usbhid
           bus ID: 1-2:2
           Device-6: Kingston HyperX Virtual Surround Sound type: USB
           driver: hid-generic,snd-usb-audio,usbhid bus ID: 1-9:5
           Sound Server: ALSA v: k5.4.0-18-generic
Network: Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet vendor: ASUSTeK
           driver: r8169 v: kernel port: f000 bus ID: 04:00.0
           IF: enp4s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
Drives: Local Storage: total: 6.60 TiB used: 411.34 GiB (6.1%)
           ID-1: /dev/nvme0n1 vendor: Samsung model: SSD 960 EVO 250GB size: 232.89 GiB
           ID-2: /dev/sda vendor: Western Digital model: WDS500G2B0A-00SM50 size: 465.76 GiB
           temp: 25 C
           ID-3: /dev/sdb vendor: Western Digital model: WDS500G2B0A-00SM50 size: 465.76 GiB
           temp: 22 C
           ID-4: /dev/sdc vendor: Western Digital model: WDS500G2B0A-00SM50 size: 465.76 GiB
           temp: 23 C
           ID-5: /dev/sdd type: USB vendor: Western Digital model: WD easystore 2624 size: 4.55 TiB
           ID-6: /dev/sde vendor: Western Digital model: WDS500G2B0A-00SM50 size: 465.76 GiB
           temp: 24 C
Partition: ID-1: / size: 223.52 GiB used: 71.65 GiB (32.1%) fs: btrfs dev: /dev/nvme0n1p3
           ID-2: /boot size: 945.6 MiB used: 143.0 MiB (15.1%) fs: ext4 dev: /dev/nvme0n1p2
           ID-3: /home size: 223.52 GiB used: 71.65 GiB (32.1%) fs: btrfs dev: /dev/nvme0n1p3
           ID-4: swap-1 size: 7.46 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/nvme0n1p4
Sensors: System Temperatures: cpu: 27.8 C mobo: N/A gpu: amdgpu temp: 42 C
           Fan Speeds (RPM): N/A gpu: amdgpu fan: 0
Info: Processes: 484 Uptime: 15h 06m Memory: 31.36 GiB used: 3.27 GiB (10.4%) Init: systemd
           runlevel: 5 Compilers: gcc: N/A Shell: bash v: 5.0.16 inxi: 3.0.38
```

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-control-center 1:3.36.0-0ubuntu2
ProcVersionSignature: Ubuntu 5.4.0-18.22-generic 5.4.24
Uname: Linux 5.4.0-18-generic x86_64
ApportVersion: 2.20.11-0ubuntu20
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed Mar 18 15:52:07 2020
InstallationDate: Installed on 2020-03-12 (6 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200309)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)