"It depends. Screen resolution and multiple monitors affect how much storage an image takes. For a general guideline, if you have a 1080p monitor and run it nonstop for a full 8-hour workday, you could expect in the range of 200-500MB.

Apse is fully configurable. If you find it takes too much storage, it can be set to delete snapshots after a certain number of days. For space savings, by default images are saved at a lower quality. If you would rather keep full-quality snapshots, you can set that in your configuration as well."