Hello

The SD-Explorer tool works regarding backup and restore likes the backup and restore of the Songmanager, but only with an extra SD-Card sanity check. When there are Audio files on the SD Cards, you can still move the technics song files from and to that card. The Audio files are left unharmed and untouched.

For more info about the tool's functionality:
http://vision-4-life.nl/SDExp_tut.htm and http://vision-4-life.nl/FAQ.html