Wow, thanks for all the info.For hard drives, that might or might not work (since it is unpowered). I had inconsistent experiences with these three unpowered hubs that I own, when using it is this way:
this passive 4-port 3.1-gen1-A hub
this other passive 4-port 3.1-A hub
this additional passive 4-port 3.1-A hub
In regards to the three unpowered USB-A hubs, I have connected them directly to my 2011 and 2014 MBPs, and they run fine when directly connected for everything except bus-powered 7500 RPM HDDs, which still usually work correctly. However, I have connected them to:
this powered USB-3.1-A hub, with the ability to operate either on bus power or via AC power
this hard drive enclosure + 3-port USB 3.1-A hub, with the ability to operate either on bus power or via an AC power
formally this powered ThunderBolt 2 dock
this powered ThunderBolt 2 dock, which is currently my main dock
...and the performance with all three passive hubs has been somewhat inconsistent - 7500 RPM 2.5 HDDs don't always perform correctly, and would sometimes disconnect momentarily and then reconnect. Certain USB SD card adapters, and my Corsair Voyager GT-X flash drives (which presumably consume a lot more power than a normal flash drive) also would now and then have some issues connecting. Two 5400 RPM HDDs would have disconnection issues as well.
I believe this has to do with insufficient power of USB-A when using the bus power supply only. The 10 port USB 2.0 hub I have running through my ThunderBolt2 dock has its own AC power supply as well as the ability to operate unpowered. If I am running it unpowered, 2.5 inch hard drives without their own independent power supply function erratically as described above with the unpowered hubs. When I connect the AC power, it operates flawlessly. So you may need something with its own AC power supply...
Well, since the Caldigit TS3 lite has 2 USB-A ports, I could use this 2 for heavy stuff (Hard drives), and the unpowered 4 USB-A hub just for the bluetooth mouse, keyboard and pendrive (and maybe the USB speakers (JBL Pebbles).
Or I may go for this one.
https://www.amazon.es/dp/B00E4J7PTM?ref=emc_b_5_t
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