Apache responding with Request Entity Too Large

Solution 1:

There's a method using mod_security, assuming you don't mind making it much larger:

You can also limit the size of the HTTP request body data. This is very handy for disabling large data in HTTP POST requests.

SecRequestBodyLimit 10485760

This is probably worth a read about any consequences of such a change: Mod Security HOWTO

Solution 2:

If you're using PHP on the server to upload the file, you might want to look in your apache configs for something that looks like "LimitRequestBody" or other restrictions on the size of the data allowed for upload. post_max_size is another thing to look for in php.ini, along with upload_max_filesize