Running out of disk space

[BobBritt]

We host images and probably have 12 years of images stored. I delete really old stuff from the Media gallery but it doesn't dent the space used.
The website has gone through some updates till we ended up with Xenforo but I have existing links for images. If I set directory permissions to 700 and the website still runs, it's safe to say that nothing in that directory is being used for the website correct?
Running out of disk space

free plugins
minecraft paid for free
mcmarket
mc-market
free minecraft paid plugins
free minecraft plugins
spigotmc
SpigotMC
aac free
ewg free
Minecraft Premium Plugins
ewg free download
litebans free
epicworldgenerator free
free schematics
leaked schematics minecraft
schematics
schematics leaked
schematics free
minecraft schematics free
paid minecraft schematics free
paid minecraft schematics for free
free cracked plugins
free cracked minecraft plugins
plugins
featherboard download
featherboard plugin download
antiaura download
xenforo leaked
xenforo for free
xenforo addons