i'm not sure if a usb hub or laptop dock will have any negative impact on sharing usb ports, but a usb 5gbit/s port itself should have speeds capable of running 2-3 hdd's or 1 ssd, like the samsung t3. a 10gbit/s usb 3.1 gen 2 port is 2x as fast and could use something like the Glyph Atom RAID ssd to get faster speeds.
There is new faster portable SSD device that if your Type C port is Gen 2 (10 Gbits/s) you can get this type of speed:
I have not tried this device yet but it does sound a little interesting. The only problem I have it uses two SATA III M.2 devices in RAID 0 so you really need current backups.
With this device or even with the Samsung Portable T3 SSD devices you really no longer need multiple hard disk drives to smoothly edit in Premiere Pro
The Samsung is whagt I use on my laptop and my workflow all project files and media files are on one device
Thanks for all advice!
@RoninEdits: In my experience simple splitter limits speeds at a USB 3.0 port I don't know why
@Bill Gehrke: One project of mine can easy go up to 500GB and I might have running several at time so I need a solution for both: as much space as possible (to reduce the time of Data shuffeling) and as fast as possible.
Thanks for further adivce!
The Samsung T3 is also available in 1 and 2 TB sizes so you really might not need several at a time.
Alright, thank you.