As we can see from the picture above we can break down these cards based on several identifying factors. So you want a 256 GB card? There are some advantages in buying 1 x 256 GB MicroSD instead of 2 x 128 GB. If you want to go with up to 128 GB I think most any card will work. To go higher than that you might have a bit more of a challenge finding a card like #6, or some other card that has proved trustworthy for others.

Last identifying trait I want to point out on this front picture is the plastic used. Specifically, if you look at #1 (the genuine article) you can see that the plastic is of a translucent type. If you look at the area circled in green you can see the internal circuit board of the chip. This isn't just because the material is thin and flimsy like #3 it is actually one of the more quality cards in terms of construction. You don't really need to worry about this because the genuine PhotoFast is the only one I've seen that has this translucent appearance, but it is good to know in identifying an original. You may see some information/verbiage that states the PSP or the adapters support only SDHC cards. This is only because SDXC cards were not around when these devices were made there was only SD and SDHC format. So, the SDHC verbiage was meant to say "hey, we support the larger size SDHC, not just SD!" The same is still true in that the SDXC will work fine and indeed must be used if you want to use MicroSD cards beyond 32 GB. Note this does not mean that things from the card will load slower, but it means that the PSP will take longer to recognize the card and load its contents into the XMB memory.You may opt for a smaller card and use CSOs to save space. Comparable to the speed differential, many games can be compressed considerably from their ISO forms. CBS News, 48 Hours – AIBO, The Digital Wonder Dog: Sony Spends Millions On Robotic Canine". Cbsnews.com. February 11, 2009 . Retrieved November 13, 2011. a b "News-Latest publications from CST". www.simmtester.com. Archived from the original on July 17, 2001 . Retrieved January 25, 2022. Try a different CFW (though I doubt it will make a difference as long as both support high capacity). If however you can't get the PSP to recognize the card with all space you will likely need to get a hold of another adapter, MicroSD card, or possibly CFW.

While it is possible to go 400 GB+ larger cards are going to have speed penalties when loading the card. MS-A16G - Accessories Compatibility Information". support.d-imaging.sony.co.jp . Retrieved April 22, 2023.

After you manually create this folder structure on your PSP drive which has been successfully re-formated via the PC tools you should be good to go in using this card in your PSP. Alternately you can simply remove and replace the card. Some people believe that swapping cards while the PSP is on may lead to corruption of the filesystem on the card. While I have not personally experienced this, I tend to not remove my memory card while it is being accessed because I don't want to have to reformat and copy all my files again. However, do be sure to disconnect the USB mode from your PC before removing the card because that can lead to file system errors. If you really need all that space on one card and don't mind the waiting while the memory card is initialized each time, then there should be no problems going to the higher capacities. Additionally, all my tests were done with MicroSD cards up to 200 GB capacity (because I got a good deal on them). This means the largest high capacity setup I have personally tested is 400 GB. Theoretically, the information in this guide should be attainable for MicroSD cards of 256 GB, 512 GB, or even 1 TB in size. Practically however it may be that the adapters on the market today have a limitation or that the CFW will not indeed support such large sizes. I will leave it up to others who have the available hardware to test this.

This process simply entails re-formatting your card through the PC. After putting your PSP in "USB Connection" mode and seeing the drive letter appear in windows we need to reformat. Additionally, the adapter you use may determine the maximum amount of memory (based on what it can support. At this point the PSP drive letter should show as a good drive on the Windows system and you should be able to browse and copy files to/from it.You may find after reading all the information presented here that you have no need to go beyond ~200, ~400, or ~500 GB in size based on other usability factors I will discuss below.