@MrT10001 oh, cool, that is the good news, thanks your research,so the solution that I need change the more better OTG hub, I will try it, thanks your effort again.

@MrT10001 waiting your good news

@MrT10001 thanks your response, when charging and I plug the USB storage into the OTG HUB,it is not work. and when reading USB storage then plug the charger, USB storage will remove automatically. I don't know if anyone have encounter this issue, please share you experience, thanks!

appreciate if anyone can help,thanks!

1+6T can not read USB and charging together when use OTG USB HUB, that is the known issue or can fix it?

@ikoz I search in internet and find below solution, but not work, even memory fully used, but swap used still is 0, I don't know why.

sudo fallocate -l 8G /userdata/swapfile
sudo chmod 600 /userdata/swapfile
sudo mkswap /userdata/swapfile
sudo swapon /userdata/swapfile
sudo sysctl vm.swappiness=80

@MrT10001 thanks your response, I know how to reset the partitions, but what I want that create the swap and increase the memory, I am not sure if can work in UT.

@Moem increate the memory for run the script, is that possible? or some limit in ubuntu touch?

when use command free -h show the memory , it show Swap value is 0, how I can create the Swap and use it? anyone have the detail step? thanks!

@arubislander ok, Thanks for your answer.

@arubislander thanks your response, And I want to use multiple user in my devices, so I add a new user and set the password, but it doesn't work for passwd, I search many solved case ,but didn't work for me, could you help give some advise? thanks!

when I used command 'adduser' add a new user and change password by 'passwd' command, it show below error:
-- passwd: Authentication token manipulation error
-- passwd: password unchanged

and used 'journalctl -t passwd' check the log, show 'pam_extrausers(passwd:chauthtok): user "newuser" does not exist in /var/lib/extrausers/passwd', and i added the user info in the show path try passwd command again, and it can update the password show:
-- Enter new UNIX password:
-- Retype new UNIX password:
-- passwd: password updated successfully

but actually it doesn't work,can not use the password login the user, and i run again the command ''journalctl -t passwd'' , it show error "gkr-pam: couldn't update the login keyring password: no old password was entered", I don't know how to solve this error, any guys can help this? thanks in advance!

@arubislander oh, thanks, after formatted to FAT32, it works now.

Onepluse6T ubuntu touch can not identify USB， Is that a known issue for OTG not recognized？ anyone can help how to mount the external USB to device? thanks in advance！