The HDD will work since it's just the same piece of hardware.
Originally Posted by ciditin
You cannot use anything on the 'US HDD' if you put it in the japanese PS3. PS3 HDD contents are encrypted and accessible by only the exact device that performed the encryption, so if you slap it in another PS3 that one will ask to format it.
Thing is my nephew from Japan sent me a Japanese fat PS3 and something is broken. So I would want to use a hard drive to with US PS3 stuff in it (old 60G first release PS3) to try to fix it.
So no, you cannot use it like that.
Playstation 3, Waninkoko V2, 1 terabyte internal HDD.