Updating psp through usb dating playing it safe
Confirm that the storage media is connected to Play Station 3 system, and retry the update process as instructed above.
Check that the USB device is formatted to the File Format FAT 32 or FAT 16.
Using the PSPUsing Your Computer Using a UMDInstalling Custom Firmware Community Q&A Your PSP firmware controls your system settings, and new versions get released to add features and fix errors and security problems.
There are several ways that you can update the firmware on your PSP.
Keeping your PSP's firmware up to date is important if you want to take advantage of all the neat features Sony has included.
Many new game releases will also require you to have a certain firmware version to play on your system.
Downloading and installing the PSP® (Play Station®Portable) system software update will update your PSP® system's operating system to include the latest security patches, settings, features and other items.
Put your PSP in "USB MODE" found under the settings section of the XMB 3. Go to the PSP Memory Stick, usually a removable drive ex. There should be a folder Named "PSP" Go into that 6.
If you want to use homebrew software on your PSP, you can install custom firmware.