Oh man this is nice. I've been juggling space with an 8TB drive for years (got one when it was the biggest you could get). Recently after deleting some old stuff to free up space I discovered all the newer stuff was fragmented to shit. I was able to squeeze as much as I could onto SSDs and SD cards, defragment the entire thing with Defraggler, and move everything back into defragmented free space. I've managed to pack it like a can of sardines - I've gotten it down to less than 2GB free with no more than 2 or 3 fragments for most files, 7 tops. Still transfers both read and write at around 80MB/s average.

I've experimented with Plex, but since I used to only use the one system with Kodi I never bothered. I recently got a small HTPC to use with an old 3D TV and it's super easy to move Kodi's db to an external MySQL server to sync paused playback and completed lists etc.

I can also just connect Kodi to nVidia shield/moonlight and watch my entire library on my handheld wherever I go, without any additional setup other than Kodi on my desktop and making use of Moonlight which I use for emulating games a bit too powerful for my handheld