So I've got this old ASUS laptop that's about eight years old with Windows 8.1. All I want to do is use it to copy some files from one external HD to another. The laptop is a mess though. The screen flickers and goes to black constantly and it's extremely slow. The data I'm trying to transfer is very important so I wanted to do a test with some other HDs I had lying around. I plugged them in but I was unable to safely remove them. I click the exact drive to remove, but it just does nothing for over 10 minutes. So then I unplugged the HDs and the drives were still mounted on the computer for some reason and all the data was accessible even after unplugging. Anyway, I then plugged those external HDs into another computer, it said there were errors on the drive that should be scanned and fixed. Despite whatever these errors were, the drives still worked fine, and after performing the scan, they were apparently back to normal. I tested them again in the old laptop and got the same result. They show up fine, transfer files fine, but are unable to be safely removed, so I unplug it and then the drive has some kind of errors on it next time I plug it in. Can anyone provide some guidance on what might be causing this and how I might go about fixing it?