https://wccftech.com/user-mods-custom-xbox-series-x-s-cfe-adapter-card-that-supports-non-proprietary-ssds/

A user on Chinese Bilibili forums has shown a custom modded SSD which acts as a non-proprietary storage solution for Microsoft's Xbox Series X & Series S consoles.

Microsoft's Xbox Series X & Xbox Series S launched with proprietary SSD solutions that let you expand the storage capacity of your consoles. These proprietary storage expansion cards are manufactured by Seagate and offer 1 TB expansion at a price of $219.99 US. That could be a bit expensive compared to standard 1 TB SSDs which come in at a cheaper price.