is this just my imagination on my computer

i have lots of media folders on my windows desktop computer, some folders containing thousands of picture files....but i was searching through a media folder yesterday, a folder which i created over a decade ago now, and there wasn't as many pictures files in it that i thought there was?

so i'm wondering has anything deleted some pictures from the folder or hopefully, there was always that many pictures in the folder and i just don't remember?

hopefully no picture files have been deleted from it and i'm just imagining it, anyhow i hope for some reassurance and thoughts on this, thanks.