Easy way to transfer tons of old photos to flash drive

It is absolutely worth the time to get your family's memories into digital format. We raised three sons who are now in their 40's with their own children. I began scanning my 3000+ photos when I retired six years ago. Believe me, it was time consuming. I managed to place them plus thousands of more current digital photos into one file and use a collage screen saver software. Every family member who sees the screen saver will sit and stare at the collages for ever. I walk by and there always seems to be pictures I forgot in the collage.

I duplicated the picture file onto data DVDs for safe keeping and for other family members.