Hello. On my Note 3, there is a Move option in Gallery and in the My Files app. I don't have an SD Card inserted so cannot screenshot that.
Try Gallery - Camera (photos) - menu - Select - select all with drop menu - menu again (not the Share icon) - and there should be an sd card option if it is mounted.
Let us know if that works.
Bleeding ATM stole my card last night, if anyone is curious why I took an ATM pic