No, 6 bytes is a very very very small file.
Say you want to allow a 1mb file size.
1mb=1048576 bytes
So enter 1048576 in the field for file size.
When you stated 6 I assume you meant 6mb
For 6mb you would enter 6291456
But bear in mind that your host may limit that size, so whichever is less will only be allowed.
