Device Issues

[Morgan_Nelson]

I cannot access my devices and I cannot access any files

[#2]

Since when this problem started?
Is it an external device? (e.g., Flash Memory, External Hard Disk...)?
Is it SSD or HDD?

[#3]

HDD. It started yesterday.

[#4]

What happens if you right click and then click on Properties?
If yes, then click on Tools and under Error checking, click on Check and let it runs.