Overstuffed Filing Cabinets

[blueerica]

I'm going through my stuff and I realize that my filing cabinets are WAY too full. I figured I'd come on here and see what other LoT folks do when cabinets are stuffed to the gills.

How far back do you keep your records? For closed accounts? For active ones? Do you look and see if there are relevant items that might need to be referred to, or do you just toss, toss, toss?

Opinions are greatly appreciated!