I cannot saved a file on my Doents, after copying and pasting it into a Word Pad. Pl's help. Thanks?

I was doing copying and pasting into a word pad, then saving it to my Doents, after saving a lot of files on my doents I decided on creating a folder to consolidate the files. After this, I could not save any more the rest of the files into my doents. Can anyone please help! Thank you very much.