File Concatenating

Is there an easy way to select x number of files, named 01 Song A, 02 Song B, etc, and then add 1- to each one?

I just had to manually rename with Ctl-C & Ctl-V over 400 songs from 18 CDs. After selecting

all the ones from CD1 and adding the 1- to them those, I’d like to then select all those from CD2 and add 2- to the file names. Usually they are all in their own folders but I end up putting them into a single folder and need to distinguish 01 Song A in folder 1 from 01 Song A in folder, such as 1-01 Song A, and 2-01 Song A.

Thanks!

I can kick out to a file renamer program but prefer to do it all in MP3Tag

have you filled the field DISCNUMBER?
If not, try the auto-numbering wizard and set to only write the discnumber.

Then try
Convert>Tag-Filename
Format string: %discnumber%-%_filename%
If you want to set it manually for CD2, try
Convert>Tag-Filename
Format string: 2-%_filename%