If you have a Vita card that's been in a higher firmware PSVita, you can’t use it on a lower firmware one. That is unless you format the card. Thanks to CardUnlock, memory card swapping with higher FW Vitas won’t be a pain anymore.
http://wololo.net/2017/05/06/cardunl...meant-fw-3-61/
https://github.com/cnsldv/CardUnlock
https://github.com/cnsldv/CardUnlock/releases/tag/v1.0
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