Yes. I was using the .mp4 method butbwas so limited and i need to rename files etc.
And yes you need to delete your psvita savedara before copying again or will show a error msg. So before copying new stuff just delete the savedata you can do that in manage content.
And remember its only work with QCMA. Will not with CMA i think.
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I dont think size matter. I transferred 2.9Gib from uncharted.bin.
This characters limitation scary me. I didn't test it. I hope its not so limited. Because will make sad.
character limitation iirc is only to make the vita identify the files on its content manager
you can rename it on vitashell after that
tried transferring a 945mb Dragon Crown VPK (renamed DRCWN.VPK) and its successful
so no problem here