Backup adjectives are listed in this post. Each word below can often be found in front of the noun backup in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing BACKUP.
additional, adequate, appropriate, automated, automatic, based, complete
current, daily, different, differential, first, full, good
great, immediate, in, incremental, initial, last, local
manual, more, multiple, new, normal, old, online
only, other, own, party, previous, recent, regular
reliable, simple, single, site, solid, windows
Hope this word list had the adjective used with backup you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.