PSP homebrew developer ABCanG1015 is back with an updat to his very useful app called MStoMS.  This is version 1.1 and MStoMS stands for Memory Stick to Memory Stick.  This handy app allows you to move files from 1 memory stick to another using your PSP without the need to use your PC.  You also have the ability to delete or rename files.

Since this is a signed version of the app you can also make use of this if you are using a PSP on OFW.  See the full changelog for version 1.1 below.

Changelog v1.1

"Now the homebrew works on libmenu instead of Intrafont.
Now more files can be transferred at a time.
The button has been changed or confirmation by the X button in the English version.
Correction of adjustments and changed the graphical interface."

Source