Unable to write files to my secondary HDD

[HennoeR]

Hi, for a few days now I'm unable to write anything to my secondary HDD (internal). I just get a pop-up saying something of an unknown error. My main boot drive seems fine.

 

[wildwillow]

Take a look at the drive with Disk Utility, check out the S.M.A.R.T Status of the drive, it may give you an indication of a problem. Try running First Aid. Could be a hardware problem and if it is, you should get as much data from it as possible and as soon as possible.