This was a while ago so it’s possible their quality control has improved over the years, but I had two Matias TactilePro keyboards fail: the first developed keybounce/chatter after a few months, the replacement developed it after a few weeks then had keys fail. They gave me some mild run around the second time and I just wrote it off rather than deal with them.
I have a number of other keyboards, including Unicomp, and only Matias and a Filco Majestouch gave me problems and the Filco went several years of daily use before needing a key switch to be replaced.
I just read the specs and there is an SD slot.