If you are trying to read comics, put them all in a big zip file (ex: comic.zip) and rename the extension to .cbz (so comic.cbz). Alternatively you can RAR them (comic.rar) and rename the archive to .cbr (comic.cbr) for slightly better compression.
This not only allows you to read your comics with dedicated comic software like the free
CDisplay for windows (or
comix for linux, I'm sure there are other versions), but you can use
Calibre to convert these files to epub or lrf into coherent, easy to manage files.
Trust me, as someone who goes through gigabytes of manga, you are much better off this way than messing around with loose jpg files.