It may be file name, extension, adding prefixes, adding sequential numbers or letters (a,b,c), or basically any pattern.
Ex. File123-213-2.mp3 --> 1.File123-213-2.mp3 or 1.File.mp3 or File (1).mp3 or Totally_Different_File_Name_1.mp3 etc.
Any files are acceptible (photos, music, videos, documents, etc.)
Note.1: If the total file size exceeds 10 GB, I will need an additional day for download and upload proccess.
Note.2: I will store renamed files to dropbox (or alternative) for 5 days after i finish the job. After 5 days I will delete them.
I will rename up to 200 files (pictures, music, videos, text files, documents, etc.)