Do you keep them? I've digital photos of our garden saved in monthly files on my laptop since 2004. Before that from some contact prints taken between 1885 and 86, I've the same for annual holidays. For family, from 2004 on digital cameras, before that from contact prints and before that from transparancies going back to the sixties converted to digital files on my old scanner printer. They rarely get looked at but they are there for reference, It's a bit like me keepimg a few thousand mp3 music files. The photos can be interesting as it records the development of the garden, the successes and failures and you notice how some perennials you've had for decades, do better in some years than others.