As @cjcox answered many of your issues… as for the statement above - it don’t! As how it works under 
Windows 10 - it don’t. How does it work under an iPhone - it don’t. Theses are really just the UI, user interface, or “control panel” (that’s not really a good term).
The “viewing device” runs an app, web app on a PC. As with virtually anything from the internet run in a browser, it’s largly platform independent
Tablo Apps & Comparable Devices notes:
- Not fully supported on all browsers - optimized for Chrome and Safari
So you probably will want to use Google Chrome, it’s only optimized - not a recommended or officially supported (TabloTV claims there are officially supported browser, but won’t release a list). If it’s your choice, you’ll find Firefox works well (you don’t get a Most Recent recording filter).
Here’s tablo’s official information - https://www.tablotv.com/setup-networking/#harddrive
There are no speed or performance benefits from USB 3.0 and solid state drives (SSD) vs. USB 2.0 and spinning drives.
I suspect you need to take into account network topography, recorded quality, which impacts network congestion. If you have the highest quality and want to push all that to several devices over a Wi-Fi network, no matter the performance of the drive, there may me an issue (but not necessarily)
No, but there are amazing 3rd party apps, most for exporting recordings, a couple allow viewing (or just getting a streaming URL for your own media player) recorded content.