Ah this is good to know. Thanks!
Instead of an external hard drive, I am planning now to connect a SanDisk MobileMate USB 3.0 microSD card reader to use on with a 512gb MicroSD. I am guessing this would be faster than just usb 2.0 and the cheapest most efficient solution.
https://www.amazon.com/gp/product/B07G5JV2B5/
what do you think?
I use a cable exactly like that one and am having (mostly) zero issues so I don't think it's the cable itself. I am a firm believer that even via OTG any given flash stick or (micro) SD card is still hit or miss. I have four different microSD cards and several different adapters & I said "(mostly)" because my 4, 16, and 128 GB cards all work with every adapter.... but my 200GB card does not work with ANY of the adapters, at all. It just boots to stock despite the fact there's nothing wrong with that specific card.
All in all, I'd chalk the slowdown to either 1.) not enough power from whatever power source you are using, 2). a bad/corrupted/incompatible microSD card, 3.) a bad microSD reader/adapter, 4.) corrupt game files, or 5.) any combination of 1-4. I very much doubt it's the cable, but as I said... I think regardless of OTG the entire thing is STILL very finicky and picky. OTG does not equate guaranteed compatibility & I think too many people are under the assumption that it does - then are surprised when their stick or card doesn't work.
Here is the setup I have:
OTG Cable: https://www.amazon.com/gp/product/B00CXAC1ZW/
USB Hub: https://www.amazon.com/gp/product/B071JTSMVQ/
microSD Card: https://www.amazon.com/gp/product/B06XWZWYVP/
microSD Card Reader: https://www.amazon.com/gp/product/B07G5JV2B5/
https://www.amazon.com/dp/B0BZJ5PBYH?psc=1&ref=ppx_yo2ov_dt_b_product_details
https://www.amazon.com/dp/B07G5JV2B5?psc=1&ref=ppx_yo2ov_dt_b_product_details
Keeps me from having a bulky SSD flying around the already small glove box.