No hub as there is no physical attachment to the iPad - it's wireless. I generally use a Samsung 500GB T5 SSD with it but I also use a Western Digital 4TB My Passport hard drive at times. My usual SD cards are 256GB SanDisk Extreme SDXC but I also use 256GB uSD cards in SD adapters. All are formatted exFAT.
Some time back, I posted a review of this model -
https://forums.macrumors.com/threads/new-ravpower-filehub-model-wd009.2166261/
I also reviewed an earlier model that had similar performance characteristics. That review has data transfer numbers -
https://forums.macrumors.com/threads/new-ravpower-filehub-model-review.2128117/
It's not as fast as a hard-wired connection but it's dependable. If I can't depend on/trust a device, speed is irrelevant.
Edit: I just noticed that the link you have is to an app. I'm referring to the hardware device -
https://www.amazon.com/RAVPower-FileHub-Wireless-Portable-Transfer/dp/B07P5QDQ1B
Edit 2: I saw that the FileHub is $10 cheaper at https://www.ravpower.com/ than at Amazon and that if you create an account there, you get an immediate 20% discount on purchases through them.
FileBrowser for Business got an update today and it now supports multiple USB connections. I did a test with the following:
2018 12.9 iPad Pro
256GB SanDisk Extreme SD card from Canon camera
500GB Samsung T5 SSD (exFAT)
HooToo USB-C hub
I copied 654 Canon RAW images (14.5GB) from the SD card to the SSD. Transfer took 8min 30sec. All files copied and no corruption.
Edit: Did the same test but with the wireless RAVPower FileHub. Transfer time was 18min, no missing files or corruption.
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