It does what it says: insert the SD card into a PS Vita to give it an additional 32 Gigabytes of storage for movies, music, games, and photos. However, this is only because the Vita is designed to work with this specific type of card and not standard SD cards (remember PS2 memory cards?)
I've also heard from one gamer that if a 32 or 64 GB SD card is inserted into a Vita there is a chance that the data on the card can be randomly corrupted so Buyer Beware!
Length of ownership: 3 months
No: I don’t recommend this product