psp max memory on sd card it can read ?

[ZeroX4]

so i did buy long ago this ms pro duo adapter



where as you see i can put in micro ms pro duo

i did buy micro 2 16gb card and it works just fine and im switching them cause i have 2 adapters and that 2 16gb cards i use umd as hmm lets say pocket for the other 16gb card im not using at a time and switch them when i wanna play different games

but than few days ago i found i can buy this kind of adapter



where as i read i can input 2 x 16gb micro SD cards (not micro sd pro duo) to gain 32gb at once

so i was willing to buy that BUT!!! yesterday my friend come to me which have psp

and tells me he got this kind of adapter i have so far



and he tell me (cause i always was sure i have MICRO SD PRO DUO) that this adapter reads normal SD cards

and as i look on that card adapter (i took out my adapter out from psp) it had normal Micro SD card inside that adapter and not micro sd pro duo

so to think of it i just realized i already had normal sd card and normal sd card reader which convert it to sd pro duo

and so 2 question have been born in my mind

1st (cause i reeded that white adapter for 2x cards can read MAX 2x 16gb cards to gain 32 cards) how big card BLACK adapter with slot for ony 1 sd card can read ? so like would i be able to read via that adapter at once 32gb sd or even 64gb sd ?

2nd how big cards psp can read at all ?

i know about classes of cards i know about transfer speed and i dont care about it i just care only about size in GB it can read

plz dont tell me what you think just show me some proofs links to psp specs or idk anything that will tell me what i should buy bigger SD card for black adapter (lets say 32gb or 64gb) or white sd adapter for 2 cards to read 2x 16gb cards max ?