Your system information

• Steam client version (build number or date): 1773426488
• Distribution (e.g. Ubuntu): Archlinux
• Opted into Steam client beta?:No
• Have you checked for system updates?: Yes
• GPU: Nvidia/AMD

Please describe your issue in as much detail as possible:

Remove storage from other partitions (here it's /mnt/data/), it will be added back to the list next time when you start Steam

Steps for reproducing this issue:

1. remove a storage in other partitions
2. restart Steam
3. find that the storage is still there