We remember when Mac OS lived on a single-sided 400K floppy disc, and the first hard drive we ever saw was a 5MB Winchester the size of a small suitcase. Our first Mac hard drive was a 20MB SCSI drive, and at the time we genuinely wondered if we'd ever fill it.
Fast-forward a few decades, and now a single photograph won't fit on that old drive. 50MB RAW files are the norm, and even 100 JPEGs can chew through half a gigabyte without breaking a sweat.
A 1TB or 2TB drive sounds like a lot — until you load it up with stacks of RAW files and hundreds of “similar, not duplicate” photos of the waiter delivering your birthday cake. (Why take one or two shots when you can hold the shutter down and get twenty?) It doesn't take long to run out of space.
Hence, Photo Housekeeper. It does two things — simply, efficiently, and well.