Don't do anything
If you forgot the password, you can't unlock it. The only way to unlock it is to wipe out the iPod's memory completely by restoring it through iTunes.
When you unlock a passcode that has been forgotten on your iPod Touch, all of your songs will unfortanetly be deleted, and you will have to put all of them back on. But if you are CHANGING your passcode, off of the settings button on your iPod Touch, nothing will happen to your current memory.
how to unlock a ipod nano 4th generation
The amount of memory that is says is the formatted memory, not the actual memory.
Well, use Redsn0w to jailbreak/unlock the iPod.
The ipod does not have a memory card slot, so no memory card will work with it.
You have to Restore the iPod through iTunes if you don't have the combo to unlock it.
There is not an iPod that has such memory. The largest memory for an iPod is 160GB (the iPod Classic), which is enough to hold around 40,000 songs.
restoring to factory condition that's the way to unlock any iPod
You can not download more memory to an ipod.
slide 2 unlock
No, but you can put the memory stick into computer, plug ipod touch into computer and add stuff from memory stick onto itunes and from itunes to ipod