I'm fairly certain it's NTFS. Just my luck.
First I have to find the darn thing. I've got it stored away so securely that I've forgotten where I've put it.
Sent from my SEXY GORGEOUS AWESOME GOLD 128G iPhone 6
️
️
️
If you intend to install any Windows OS (7.0 up) using Bootcamp (which is provided in the Mavericks and Yosemite OSes to allow users to run two partitions separately [one Apple, one Microsoft]), the external drive will need to be formatted as exFAT, providing access (read/write) from the Yosemite and Windows OSes, individually. I use a SONY video suite to take care of my business/client projects and it is only available to Microsoft operating systems, so I have the experience of needing to figure this out. I use Photoshop (two versions,) SONY Vegas Pro 11 and SONY DVD/BD Architect in a professional environment. The SONY stuff in Windows (as well as PSCS5 Extended for Windows) and PSCS6 Extended in Yosemite.
When I initially set up my Macbook Pro, I used (and still do) five external hard drives, one is partitioned to use with Time Machine in Yosemite for backups, and it actually contains two partitions. Photoshop would not save to an NTFS formatted drive directly, which all were upon taking delivery of my Macbook Pro. I had to save to the desktop from Photoshop (Windows and, then, Mountain Lion,) close Photoshop, then drag the file to the hard drive. Very annoying.
The Apple Communities (forums) provide "How-Tos" on this procedure, as do the Adobe forums for those using Adobe video and image manipulation applications.
If you intend to use your external drive on separate machines at different times (moving between two or more machines) and desire read/write permissions on it from separate machines, it will need to be formatted as exFAT. exFAT plays well with both Apple and MS.
Having said all of that, if anyone reading this has information that refutes my statements, feel free to (nicely) provide me with the correct information. As it is now, these have been my experiences. I had to do this to five external hard drives, ranging from 250 gb to 2 tb. I have had no issues at all, using two different operating systems on a 500gb flash drive at 8 gb RAM since sorting this out two years ago. The first month was a nightmare. Not that the equipment was in error, but that Microsoft doesn't like to share with Apple as Apple does with Microsoft. After all, Apple allows Windows installations of OSes on their machine. Microsoft does not reciprocate to Apple on their machines.
Thanks for looking,
Kelly J.
P.S. qbnkelt, if you need help when you make the move, you know where I am.