Right now, the wd software does not offer the option to back up files that are stored in n sd card. Since there are a lot of portables out there that usually lack space in their ssd’s or hdd’s, many users store their photos, docs etc. in an sd card. I think that it is necessary for the wd software to be able to back up files from the sd card to the wd drive. I consider this as essential and should be included in the very next update.