USB Gibberish language

When I plugged in my 8 GB USB in to my laptop, no files were visible. Since I had encountered this problem earlier, I applied the attribute command in cmd and all the files appeared but in a gibberish language. I found a solution for this and read that it could be solved by CHKDSK on cmd. I ran the command and it was able to recover most of the files, but this virus had filled up the memory. So when I said Yes to recovering all the files, it showed it didn't have enough disk space to restore the files. And I cannot copy these files either. Can anyone suggest me a method to recover these files?

Welcome to the forum.

Flash drives are the least reliable of modern storage media and cannot be trusted as primary storage of important files. Add to that they may be lost, stolen, or physically damaged. They should be used primarily as a transport media where there is always a copy of the files stored elsewhere. All files of any importance, wherever they are stored, need at least one backup copy, 2 or more back copies if the files are of particular importance.

Sorry, I cannot help with recovery.