What version of FileMaker do you have?
If FMP 12, try using the new external storage option.
If an older version, SuperContainer--an expensive third party add on, could be used.
Otherwise, you'll need to avoid using "store a reference"--though a work around might be possible if you only need to view one or just a few pictures at a time.
I have ver 10 adv.
I'll do a little search on the Super container and see what thats all about.
Upgrade to 12...didn't know they had that option.