1000x800 pixel image at 70% compression is coming out at 245K here ... hmm...
Default high quality in Photoshop is 60% which drops this further ...
It might be handy if you want to upload a work in progress screenshot ?
maybe 300K ?
(just rough figures I know it'll vary)
That said I rarely upload files ... but do link to files on my site which may disappear and no I won't upload them to "Free" image hosting sites
I should probably just have an area that I won't remove files from ... but ah screw it