@kiro i guess he is talking about the "midnight commander", which is included in the retropie-image.

You can rename files there by marking a file and hitting "F6" for "move file / rename file".
If you want to rename the file you have to enter the whole path+new filename (which doesnt speed up the renaming very well ;) )

@Clyde said in [Solved] How to rename a Custom Collection?:

You both just told me the same solution in different ways. It's good to know both.

Yeah, I noticed a little later that we posted about a minute within each other. Of course he got there first, so now I owe him a Coke.