Issue connecting Go 2 by cable direct to phone

I'm planning on using Go 2 travelling in a small sailboat, on wich energy is scarce. So I'm rellying only on usb power banks.

So I bought a usb hub and a solid external hard drive, and intend to use my phone (Pixel 3) to backup files direct into the HDD.

First of all:

- phone is OTG capable

- usb hub is working properly (already tried with card readers and my phone reads it just fine)

- cable used is also OTG capable and working

Right now I'm trying to connect the Go 2 to my phone using a cable and a usb hub, but I'm having some issue.

Phone notification when connecting cables says "Issue with Ambarell USB drive - tap to fix".

- When taping to fix, it only gives me the option to format the Go 2 drive or to cancel. Canceling nothing happens and the notification is still there.
- If I choose to format the drive, it formats it and the phone start to recognize the Go 2 drive.

BUT every time I disconnect Go 2 from my phone it shows the same issue and need to be formated again to be access. So it's not usefull this way, since I want to access Go 2 files before deleting them.

(already saw a man using Go 2 this way on youtube succesfuly, but it was on a iPhone)

Does any body had this issue? Is Go 2 OTG capable? Any tips on how to troubleshot this?