This is the area to clarify hardware specification if there's anything unclear from the datasheet. If the specification is software related, please ask in the related software section.

M.2 /mSATA SSD Options.

So, assuming the UP Squared maintains the M.2 2230 and mPCI-e slots in it's final form. It would be nice to have some idea what SSD's will be compatible with them. From what I have seen, m.2 2230 SSD's are limited, although OCZ has shown a "BG line" m.2 2230 that goes up to 512GB, but I can't seem to find any info on if it is available or where it get it (it is intended for OEM's, perhaps UP could carry them in their shop?) other then that there are some small ~32GB ones I have seen. For mPCI-e/mSATA, Samsung has their EVO series among others, but with all the various specifications it is tricky to know what is compatible.