Spritesheet - to Spritesheet or not to Spritesheet :)

Morning every one

I have about 100 images, on average, each 130KB (big and scary :(). I don’t want to bog down my program with huge images, and want the program to be max 5-7MB big. What is the best route? Should I throw them all on one large sprite sheet? Should I just load them externally (people would have to wait) What is the best route to take?

Thank you! :ducky: