Using Xbox Series X/S expansion cards as PC Storage

TL;DR — if you have a spare expansion card lying around and an open PCIE slot on your PC, you can use the XBox expansion card as storage with a $15 PCIE card. Speeds are not insane, but they're better than my SATA SSDs.

Hey all — this is a really edge use case here, but I didn't see anyone with this particular setup online, so I thought I'd share. I cancelled my Game Pass subscription in December after the price hikes and I found that I don't really have much of a need for this 1TB expansion card.

I bought this PCIE CFExpress Type B card reader, slotted it in, plugged in the expansion card… and voila. 920GB of extra storage. I've seen other people mention using an external CFexpress reader and needing to modify/remove the plastic handle from the card in order for it to fit, but this fit with no modification. I've included the read write speeds, which are not anywhere near their theoretical max speeds probably due to limitations of the PCIE card using Gen3. But it's about twice as fast as a SATA SSD — good enough for storing games/files/etc.