Storage server in another data centre + Web server question?

Hi team!

Alright, so I have been trying to find out how to solve my question but I am unsure what to call it and not coming up with results thus far.

My situation is that I need a server that has 100gb+ only for stage of downloads/images etc as I have Hi-Res photography images that I give to clients for download.

I have a web server that is in a country closest to the bulk of my clients, on an ssd and getting really great response times. I have a storage server mounted to this ssd server, but it is in a different country because that is where you can only get high capacity storage.

I have started to get timeouts on my galleries since it is a 180ms+ send and another 180ms to receive, so loading 1000 images its really slow.

Is there a way to make this faster by using load balancers? Or any other solutions?

I am planning to use my storage server as the main web server, and just have mirrors for the main web server to the closest data centre to my clients? Will this work? What do you call this?

Thanks in advanced.