I gess this belongs in here because it's photos from my photography lol

When i put my photos over to a USB and i plugged it into a set-top box at home and some of the files say unsupported file but they are all .JPG some work some dont and i even plugged thee USB strate into a HD tv at my friends house and still some wont work it still says unsupported file i don't think its a resolution problem cause the ones that do work are as little as 614x480 and as big as 4218x2118 i cant seem to work out how to fix it but the ones that do work look amassing lol can anyone help?