Can't find hard drive [REVAMPED]

My pc has two hard drives, an HDD and an SSD. I am booting from my SSD. Whenever I try to find the HDD partition through the file manager or the terminal I cannot find it. However I can find it and manipulate it through the partition manager. The HDD is mounted.

This is my inxi output

  Kernel: 5.9.16-1-MANJARO x86_64 bits: 64 compiler: gcc v: 10.2.1 
  parameters: BOOT_IMAGE=/boot/vmlinuz-5.9-x86_64 
  root=UUID=532c825f-d980-451a-8e4c-d49f03f610b3 ro quiet apparmor=1 
  security=apparmor udev.log_priority=3 
  Desktop: KDE Plasma 5.20.5 tk: Qt 5.15.2 wm: kwin_x11 dm: SDDM 
  Distro: Manjaro Linux 
Machine:
  Type: Desktop Mobo: ASRock model: A320M-HDV R4.0 serial: <filter> 
  UEFI: American Megatrends v: P3.70 date: 11/13/2019 
Battery:
  Device-1: sony_controller_battery_34:c7:31:d8:f1:aa model: N/A serial: N/A 
  charge: N/A status: Full 
Memory:
  RAM: total: 13.59 GiB used: 5.7 GiB (41.9%) 
  RAM Report: permissions: Unable to run dmidecode. Root privileges required. 
CPU:
  Info: Quad Core model: AMD Ryzen 5 3400G with Radeon Vega Graphics bits: 64 
  type: MT MCP arch: Zen/Zen+ note: check family: 17 (23) model-id: 18 (24) 
  stepping: 1 microcode: 8108109 L2 cache: 2 MiB bogomips: 59217 
  Speed: 1400 MHz min/max: 1400/3700 MHz boost: enabled Core speeds (MHz): 
  1: 1400 2: 1400 3: 1384 4: 1399 5: 1357 6: 1400 7: 1400 8: 1400 
  Flags: 3dnowprefetch abm adx aes aperfmperf apic arat avic avx avx2 bmi1 
  bmi2 bpext clflush clflushopt clzero cmov cmp_legacy constant_tsc cpb cpuid 
  cr8_legacy cx16 cx8 de decodeassists extapic extd_apicid f16c flushbyasid 
  fma fpu fsgsbase fxsr fxsr_opt ht hw_pstate ibpb irperf lahf_lm lbrv lm mca 
  mce misalignsse mmx mmxext monitor movbe msr mtrr mwaitx nonstop_tsc nopl 
  npt nrip_save nx osvw overflow_recov pae pat pausefilter pclmulqdq pdpe1gb 
  perfctr_core perfctr_llc perfctr_nb pfthreshold pge pni popcnt pse pse36 
  rdrand rdseed rdtscp rep_good sep sev sha_ni skinit smap smca sme smep ssbd 
  sse sse2 sse4_1 sse4_2 sse4a ssse3 succor svm svm_lock syscall tce topoext 
  tsc tsc_scale v_vmsave_vmload vgif vmcb_clean vme vmmcall wdt xgetbv1 xsave 
  xsavec xsaveerptr xsaveopt xsaves 
  Vulnerabilities: Type: itlb_multihit status: Not affected 
  Type: l1tf status: Not affected 
  Type: mds status: Not affected 
  Type: meltdown status: Not affected 
  Type: spec_store_bypass 
  mitigation: Speculative Store Bypass disabled via prctl and seccomp 
  Type: spectre_v1 
  mitigation: usercopy/swapgs barriers and __user pointer sanitization 
  Type: spectre_v2 mitigation: Full AMD retpoline, IBPB: conditional, STIBP: 
  disabled, RSB filling 
  Type: srbds status: Not affected 
  Type: tsx_async_abort status: Not affected 
Graphics:
  Device-1: AMD Picasso driver: amdgpu v: kernel bus ID: 06:00.0 
  chip ID: 1002:15d8 class ID: 0300 
  Display: x11 server: X.Org 1.20.10 compositor: kwin_x11 driver: 
  loaded: amdgpu,ati unloaded: modesetting alternate: fbdev,vesa 
  display ID: :0 screens: 1 
  Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 508x285mm (20.0x11.2") 
  s-diag: 582mm (22.9") 
  Monitor-1: HDMI-A-0 res: 1920x1080 hz: 60 dpi: 98 
  size: 497x292mm (19.6x11.5") diag: 576mm (22.7") 
  OpenGL: renderer: AMD Radeon Vega 11 Graphics (RAVEN DRM 3.39.0 
  5.9.16-1-MANJARO LLVM 11.0.1) 
  v: 4.6 Mesa 20.3.4 direct render: Yes 
Audio:
  Device-1: AMD Raven/Raven2/Fenghuang HDMI/DP Audio driver: snd_hda_intel 
  v: kernel bus ID: 06:00.1 chip ID: 1002:15de class ID: 0403 
  Device-2: AMD Family 17h HD Audio vendor: ASRock driver: snd_hda_intel 
  v: kernel bus ID: 06:00.6 chip ID: 1022:15e3 class ID: 0403 
  Sound Server: ALSA v: k5.9.16-1-MANJARO 
Network:
  Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet 
  vendor: ASRock driver: r8169 v: kernel port: f000 bus ID: 05:00.0 
  chip ID: 10ec:8168 class ID: 0200 
  IF: enp5s0 state: down mac: <filter> 
  Device-2: Ralink RT2870/RT3070 Wireless Adapter type: USB driver: rt2800usb 
  bus ID: 3-4:3 chip ID: 148f:3070 class ID: 0000 serial: <filter> 
  IF: wlp6s0f3u4 state: up mac: <filter> 
  IP v4: <filter> type: dynamic noprefixroute scope: global 
  broadcast: <filter> 
  IP v6: <filter> type: noprefixroute scope: link 
  WAN IP: <filter> 
Bluetooth:
  Message: No Bluetooth data was found. 
RAID:
  Message: No RAID data was found. 
Drives:
  Local Storage: total: 577.55 GiB used: 21.7 GiB (3.8%) 
  SMART Message: Unable to run smartctl. Root privileges required. 
  ID-1: /dev/sda maj-min: 8:0 vendor: Seagate model: ST3500630NS 
  size: 465.76 GiB block size: physical: 512 B logical: 512 B speed: 1.5 Gb/s 
  serial: <filter> rev: AQMZ scheme: MBR 
  ID-2: /dev/sdb maj-min: 8:16 vendor: Patriot model: Burst size: 111.79 GiB 
  block size: physical: 512 B logical: 512 B speed: 6.0 Gb/s rotation: SSD 
  serial: <filter> rev: 61.3 scheme: GPT 
  Message: No Optical or Floppy data was found. 
Partition:
  ID-1: / raw size: 111.49 GiB size: 109.24 GiB (97.98%) 
  used: 21.7 GiB (19.9%) fs: ext4 dev: /dev/sdb2 maj-min: 8:18 label: N/A 
  uuid: 532c825f-d980-451a-8e4c-d49f03f610b3 
  ID-2: /boot/efi raw size: 300 MiB size: 299.4 MiB (99.80%) 
  used: 312 KiB (0.1%) fs: vfat dev: /dev/sdb1 maj-min: 8:17 label: N/A 
  uuid: 57BA-6110 
Swap:
  Alert: No Swap data was found. 
Unmounted:
  ID-1: /dev/sda1 maj-min: 8:1 size: 465.76 GiB fs: ext4 label: idk 
  uuid: ee640c96-efcb-4d40-81d3-acea54d7e075 
USB:
  Hub-1: 1-0:1 info: Full speed (or root) Hub ports: 9 rev: 2.0 
  speed: 480 Mb/s chip ID: 1d6b:0002 class ID: 0900 
  Device-1: 1-7:3 info: Sony Batoh Device / PlayStation 3 Controller type: HID 
  driver: sony,usbhid interfaces: 1 rev: 2.0 speed: 12 Mb/s chip ID: 054c:0268 
  class ID: 0300 
  Hub-2: 2-0:1 info: Full speed (or root) Hub ports: 3 rev: 3.1 speed: 10 Gb/s 
  chip ID: 1d6b:0003 class ID: 0900 
  Hub-3: 3-0:1 info: Full speed (or root) Hub ports: 4 rev: 2.0 
  speed: 480 Mb/s chip ID: 1d6b:0002 class ID: 0900 
  Device-1: 3-2:2 info: Trust GXT 870 Keyboard type: Keyboard,Mouse 
  driver: hid-generic,usbhid interfaces: 2 rev: 2.0 speed: 12 Mb/s 
  chip ID: 145f:01f2 class ID: 0301 
  Device-2: 3-4:3 info: Ralink RT2870/RT3070 Wireless Adapter type: Network 
  driver: rt2800usb interfaces: 1 rev: 2.0 speed: 480 Mb/s chip ID: 148f:3070 
  class ID: 0000 serial: <filter> 
  Hub-4: 4-0:1 info: Full speed (or root) Hub ports: 4 rev: 3.1 speed: 10 Gb/s 
  chip ID: 1d6b:0003 class ID: 0900 
  Hub-5: 5-0:1 info: Full speed (or root) Hub ports: 1 rev: 2.0 
  speed: 480 Mb/s chip ID: 1d6b:0002 class ID: 0900 
  Device-1: 5-1:2 info: Holtek USB Gaming Mouse type: Keyboard,Mouse,HID 
  driver: holtek_mouse,usbhid interfaces: 3 rev: 2.0 speed: 12 Mb/s 
  chip ID: 04d9:a070 class ID: 0300 
  Hub-6: 6-0:1 info: Full speed (or root) Hub ports: 1 rev: 3.1 speed: 10 Gb/s 
  chip ID: 1d6b:0003 class ID: 0900 
Sensors:
  System Temperatures: cpu: 43.1 C mobo: N/A gpu: amdgpu temp: 43.0 C 
  Fan Speeds (RPM): N/A 
Info:
  Processes: 290 Uptime: 2h 43m wakeups: 1 Init: systemd v: 247 Compilers: 
  gcc: 10.2.0 Packages: pacman: 1275 lib: 391 flatpak: 0 Shell: Bash v: 5.1.0 
  running in: konsole inxi: 3.3.01 

Hi!

… we don’t know either - we don’t see what you can see
You should consider giving more information.
There are threads here on the subject of “how to provide good information”

I fixed it as best as i could, hope it helps

It is mounted, yet you can’t find it?
How do you know it is mounted?
Where is it mounted to?

the output of

lsblk -f

and

mount

could help