If you follow the instructions on page 19 of the manual, Connecting to PC and transferring files, you'll see in step 5 that
5. You can copy any files including MP3, JPG, and transcoded video files encoded by JetAudio VX to and from "iAUDIO" Drive.
I recommend you try to just remove all the mp3 files in your folder at once, by control clicking or shift clicking to select multiples that you want removed. Unless of course there are simply too many.
In that case, have you tried restoring the player to factory settings, as described on page 44 of the manual? (pictures not shown here)
5.1. Resetting the Player to Factory Default Settings
iAUDIO F2's settings can be deleted and re-initialized to Factory default settings.
1. After the player is turned on, select the Music mode.
2. If a music file plays, pause at the playback screen and do as shown below.
3.When, initialized, the Language setting screen will appear when the player is turned
- If the player operates improperly, press the "RESET" button at the bottom of the player and then restart the player. If malfunction continues, please initialize the player to Factory Default setting.
See this link
for an online manual.
That's my recommendation. I'm going by the manual, though, as I don't own one of those players...I hope that's the information you were seeking.
I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!