I don't know why but starting today I can't copy files to one of my external hard drives. Problem is specific to PC because I can use my external hdd just fine on my Laptop. It stops at 0%. Nothing happens and just stays that way until I unplug drive. Also for some weird reason many other things stop. Like for example I can't turn off pc but other external programs like my Chrome Browser works.
When I unplug drive then everything starts working again (for example computer shuts down).
Best Answer
HDD is all green in HDDScan and SSD gives one error: 204 Soft ECC Correction Rate 120 120 000000003F-5635 000
I read that it might be false positive depending on manufacturer (mine SSD is OCZ Agility 3 SSD 120 GB)
I think that not drives are at fault but there may be something wrong with USB drivers. I couldn't connect any external drive I have and when I plugged out camera and then plugged it back in it didn't work (Plug and Play device). Why I have problems now is a mystery. After hard reset I think that W10 rolled back to some restore point and USB works good again with camera and mouse but external HDD still have the same problem as before.
EDIT: I found solution here is what I did:
One of the weirdest problems I had in a long time. If there will be anything more I will update this answer.