My photos are kept in a file on my laptop's hard drive that is labeled for the type of shop and its address. Example: for an E/M or Shell shop, the file is stored under Shell or E/M files and then, individually, by the city and then, its address - Shell / Pleasant Valley MN, 1800 North Happy Street.
When I perform the shop again, I examine those photos on the file for specific problem or noted areas and then send them to the Recycle Bin.
About every 3 months, I save my Recycle Bin photos to a remote hard drive or thumb drive, while, at the same time, permanently discarding the older files on the same remote hard drive or thumb drive.
Sometimes its fun and interesting to look at the depth of the snow at the site when its nowmelted and gone.