Ideas

Removing files in a folder i a stressful thing because of the UX it is easy to remove the folder rather then the files that you where supposed to remove.

The button the remove the folder or the files are place beside each other and look exactly the same even if you actually selected files to remove.

The popup for removing folders are also not displaying the name of the folder you are removing so it is easy to miss interpret and you can easily remove wrong folder by mistake since it doesn't say what folder is to be removed.