UMD™ Cache    

Adjust these settings to reduce the number of times the UMD™ media is read and to increase the data reading speed by storing frequently used data in the PSP™ system memory.

Off Do not change the reading frequency of the UMD™ media
On Reduce the reading frequency of the UMD™ media

Hint

If [On] is set, you may not be able to communicate properly in adhoc mode with another PSP™ system. In that case, change the setting to [Off].