1 of the greatest psp app ever. (ohh and feel free to rep me LOL)

Changelog

Filer
fixed a bug that did not allow the exact calculation of the size of the directory
Audio player
fixed a bug in the audio player
fixed a bug when you start the UMD device.
added a feature to play in background mode by pressing square key.
added a feature to draw tag text in UTF-8 / EUC-JP mode.
added the duration of playing an audio file player
added a feature to scroll drawing a long tag text.
Picture viewer.
added a feature to mark/unmark by pressing circle + square key.

Source http://pspslimhacks.com/psp-filer-6-6/