This is what I got: https://www.amazon.com/dp/B07F63FPT3
I use this one.
To be able to use any controller other than the official DS3/DS4, the PSTV has to be modded and also a plugin is needed to enable it. It doesn't work with every controller under the sun but works with a lot of different ones (including the PDF PS3 mini controller). I asked in the thread below if the author can add support for the PDX PS4 mini and also the massive PDF PS3 controller.
Modding guide I used, you don't even need a PC anymore to do it:
Adapter that can be used to be able to use micro SD cards with PS Vita/TV (goes in the game cartridge slot):
I bought two from here. Didn’t test out the second one cause the first one works great.
https://www.amazon.com/gp/aw/d/B07F63FPT3?psc=1&ref=ppx_pop_mob_b_asin_title that's the part I'm getting. I have this in my slim from Japan as we speak. No problems what so ever.
Hers one for 5$ seems to have alot of good reviews.
Yeah, start the entire process as if your vita was new.
This is what I got:
cool, thats what I was looking at and Amz will have it here in 5hrs if I order in the next min or so
I love when that happens!
I would love this card so I can hack my PSTV!
Amazon is usually where you get em. Like this one.
In my country there are a few local shops wich sell em too, but your mileage may vary.
You wouldn't need to reformat as the SD is prolly fine.
What you could do is hack the vita using the 4gig then get an sd2vita and a 64gig micro sd and then just use the sd2vita instead since its ridiulously cheaper than using the official proprietary cards. techjames has videos on his channel of how to switch your main storage from the proprietary vita mem card to the sd2vita microsd card.
TechJames
https://www.youtube.com/watch?v=Ov6MnOJ_nHM
https://www.youtube.com/watch?v=8uJ_yc3zgJo
SD2Vita
64GB Micro SD card