I have been running FSX since 2010 and after a period of not playing any flight sim I have decided to come back, and make the switch to Prepar3d.
I currently have a system 256 GB SSD which I have my OS installed on, and a couple of other small games. I then have a 1 TB HDD which has FSX installed. I was looking to add a new Samsung 950 Pro 256GB for Prepar3d V3 (because it is insanely fast, the difference between the 950 and a traditional SSD is almost as big as the jump from an HDD to an SSD), but I was a little skeptical on whether or not 256GB would be enough, until I found out that you don't (and in most cases, shouldn't) install addons directly into the Prepar3d V3 root folder (unlike in FSX). So I considered installing P3D on the relatively limited space I have on my system SSD (No way I'm installing it on the HDD when SSDs offer such a significant boost in texture loading times). However I also read that addons like orbx DO have to be installed in the P3D root folder, which means that with my FTX Global + Vector + LC Europe combination I would almost for sure run out of space. Not to mention my other addons which might also have to be installed in the same way.
Furthermore, I would like to use the Flightsim Estonia FSX-P3D migration tool, but would like to make sure that you can use that to install addons outside the P3D directory. For example, some of my older Aerosoft addons like German Airports 3, and Stuttgart (MANY more, but those are a few examples) do not have a P3D installer, which means I would need the migration tool (not a problem, I can get that). But it sort of seems to me that in order for the Estonia migration tool to work, you do need to install addons in the traditional "FSX style", and put them in the P3D directory.
So I really just need someone to explain to me in a simple way (something that an amatuer simmer would understand) how I would install my addons properly into P3D, especially those without P3D installers and whether or not it is worth the new SSD.
Sorry for the big blocks of text, but I wanted to be very clear. I greatly appreciate any help/advice.