Filer (noun)

1. A person or machine that files something, especially papers or documents.
2. A person who is responsible for maintaining and organizing files.

Origin:

Late middle english: from file (verb) + -er.

Examples:

1. The filer was responsible for keeping the company's records in order.
2. The filer was working on organizing the old files.
3. The machine is a filer, it's used to sharpen the saw blades.
4. The filer is used to smooth the edges of metal objects.
5. The filer is responsible for keeping track of the company's legal documents.