External hdd not showing up in My Computer and Disk Management is not up-to-date

I have a problem with my hdd. It hasn't fallen or anything but just all of a sudden it doesn't show up in My Computer. Before, it was showing up but was not accessible but this time when i try to change letter, it tells me that the disk management is not up-to-date. I have a Samsung M3 1TB portable hdd. I have tried the Hdd in other PCs but I'm getting the same problem.​

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Microsoft MVP
Staff member
Premium Supporter
Microsoft MVP
First try plugging it into another pc. This will help determine if the problem lies with the drive or your pc. Also try using a different connecting cable to test if that is the cause.

Joe S

Excellent Member
Also don't use a hub and if it's a powered drive plug in directly to the wall instead of a surge protector.

I have already tried the same thing on other PCs but I'm getting the same problem...


Extraordinary Member
Premium Supporter
A main thing is, can you see the disk in BIOS? Sometimes Windows fails, even if the disk shows in BIOS. If it shows there, it's probably an issue of partition.

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