I would like to add that the Librem 5 will support Micro SD cards with storage up to 2GB (GiB or GB?). I am not sure what “biggest” sd cards are at the moment. I guess more than 1GB or so. I plan to mount it into the librem 5’s directory hierarchy and then sync it with my linux server at home with rsync over ssh. Maybe I can even go so far that the Librem 5 will become my leading device degrading the server to a backup only system. I we see what is possible when I hold the Librem 5 in my hands.
P.S. Also I still have my current Android device which lacks a Micro SD slot. So I will probably carry two devices with me and the Librem 5 be a file server over ssh / scp / sftp for the android over Wifi. Not sure if this will be possible.