Now, that said...I know we all pay a premium for character goods, but let me just note that this item is ¥4280 (about $47 USD) for a 4gb flash drive. I can get a cheap, non-cute 4gb flash drive on Amazon for less than $10. Isn't nearly five times the amount a little, I dunno...much?
Okay, survey time: let's say that your FAVORITE character of ALL TIME (is Ai that for anyone, out of curiosity?) was made into a 4gb flash drive. A really adorable one. Looks kinda like a highly-detailed Lego person, like Ai here. Would you pay $50 for it?