Folder 627 MB in size suddenly comes from nowhere
I suddenly noticed a strange folder that is about one week old. I have no idea where it comes from:
The folder itself is 627 MB in size, not its contents. If I enter the folder and try to ls it, only gibberish is listed (extract):
user(a)host:~$ ls -ldh 19_s22E-x
drwxr-xr-x 2 user user 627M jan. 28 16:28 19_s22E-x
What could this folder be, and is it safe to delete it? Could it be that one of my files got converted to a folder somehow? If so, how do I convert it back?
Thanks for any help.