on file
Available for reference through storage in a physical or digital file system. Please keep all bank records on file for a minimum of five years. I'll keep your number on file in case we need to get in touch with you again.
on file
In or as if in a record for easy reference. For example, There's no job open right now, but we'll keep your résumé on file. The use of file in the sense of "a collection of papers stored for ready reference" dates from the early 1600s.
on file
In or as if in a file for easy reference: We will keep your résumé on file.