Enter a clue or pattern or both:
The Clue
Extensive collection of data (7 letter answer)
The Answer
ARCHIVE
Tags
Notes
The answer ARCHIVE is so rare that it appears less than once every 2500 puzzles.
Related Clues
Put on microfiche, maybe
Definition
ARCHIVE as a noun:
1. a depository containing historical records and documents
ARCHIVE as a verb:
1. (archive, file away) = put into an archive