Disk space problems with running V3 and v4

[thefrog]

Having stuck with v3 for as long as I could, I now find that more and more of my new purchases only run on v4.4+. But I still want to fly a lot of my old favourites from FSX, so I'm running both v3.4 and v4.4, which has been ok up till now, but the big problem I can forsee is lack of disk space because of the size of ORBX scenery. Because I often jump to different parts of the world, I will need to have my ORBX areas installed on both sims. And when I get around to running True Earth, I would face an even bigger problem. What I don't know is whether ORBX shares the scenery between sims or is it a separate installation for each? if it's the latter, I suppose I will need to upgrade my storage in the future.
Is anyone else facing a similar problem?

[Dimus]

Unfortunately ORBX installs separately to each sim, at least for the moment. I also have 3.5 still installed, but since my purpose is just for testing, I have it in bare format, with just ORBX Global installed.