Internet downloading when i download a game demo or a video file or a network update it will always say "save failed 800100"...etc. i have a psp version 3.51 and a 1gb memory stick duo with 456mb left and i have had my psp since '06 and this problem has never happened before,but i have been using a usb2.0 cable lately. HELP ME!!!!!!!!!

On the PSP homescreen go to far left menu the ''settings'' menu and go to the top choice ''system update'' it should say ''Update via Internet'' and ''Update via Storage Media'' you need to choose Update via Internet you need a internet connection obviously,so if you haven't made internet settings for the PSP do it now.When you've done it go back to the part I mentioned above and choose Update via Internet I can't remember exactly what happens from here it's not too hard though just say yes to everything it should download it,once it's finished downloading,go back to system update,but this time choose Update Via Storage Media keep your charger plugged in now it might damage your PSP if it runs down while updating,when it's finished you go to back to the Games tab and select the Memory Stick,not the saved data utility,it should have the update in the folder you can delete this now because it'll just take up space on your memory card,it should be all done now.
good luck

You can download games legally (or demos) from the playstation network icon at the startup screen of your psp through a wifi access point. Full games cost money demos do not.

There are different kinds of games for the PSP. There are Flash games, ISO/CSO games, PBP Games, etc. Depending on your firmware type, (Custom or Official) there are special kinds you can play:

Flash games are small, quick games you can play on your PSP Browser. They don't require special firmware to run. However, the flash games tend to run slow because of the lack of memory. Download them to your PSP/COMMON Folder and type in the location of the content in the address bar. 

Ex: file:/psp/common/name.swf

For PBP Games, you can download them from the PSN and save them to your PSP/GAME Folder. These games are mostly demos. The PBP Files should have its own folder under PSP/GAME. To play them, go to your game section of your XMB and if you did it correctly, the game should be there. 

Now, for ISO/CSO files. These are Disc image files that can be played on your PSP. They're usually for backup purposes. You save them in your ISO Folder (You might have to make this folder). To play them, just play as you would with a PBP Game.

Save the PBP file to:
 
PSP/GAME/UPDATE/EBOOT.PBP

After that, you should be able to run the update from the Game section of the XMB.

Update your PSP to the latest version and sign up to the PlayStation Store (unless you already have a PSN ID). You can download full games, demos and themes (and other things) from the Store straight to your PSP. You will need a credit card or PlayStation Card to buy content.

binjour

My best guess would be to log onto the Playstation network. Make sure your firmware is updated to the latest version. There you can download demos, music, wallpaper and videos pertaining to all things Playstation.

Custom firmware (needed to run pirated/ISO/CSO games) can't be run for the PSP 3000 series. You may download demo games from the Play Station Network and they are all playable. You can play MP3s and WMA files (needs activation) on them though. Put your music files on your MS inside the MUSIC folder (create the folder if there is none present).

All you have to do after installation is to go to playstation network and download the demo or file you want to.After saving it goto the place where the file is downloaded and double click it.Connect your psp via usb and turn on usb connection.Your game will start downloading.Also make sure that you have 4.05 FW.

I just fixed mine, it works fine now. Steps:

1) copy all the data from the psp to the PC
2) reset the psp
3) format the memory stick
4) now copy the data in to the correct folders

Those are the exactly came steps that I did and mine works fine now.