issue transferring image files

in redesigning the website created a dev subdomain site within the main root of live site. there are now two databases, one for the live and one for the dev. backed up live site using updraft intending to push everything to the new database but updraft does not seem to talk to a multisite structure. so all the posts, categories, everything migrated but not the images, they still only reside on the live db.

i suppose we can keep the existing images on the live (old) db but need to figure out how to mass move them and assign them relative links ?

anyone know of other options.