Following #forensic practices, I imaged everything in sight with #safecopy: harddrives, CDs, DVDs, USB keys. Took some time because one laptop had a known faulty #Toshiba 1TB harddrive (that my father lost some work on already).
Then I wrote a script to mount the images read-only, and #rsync interesting files for easier access. Made it #idempotent so I could modify rsync filters and run the script again.