ccr 1009-8g-1s USB problem

i have ccr1009-8g-1s always losing the userman i tried to move the db to an external usb flash drive but when i plug it nothing appears in Disk list even after reboot i also changed the flash drive,changed the OTG cable but nothing working with me
so plzzz help me on this because i’m about to be crazy with this issue …

any solutions please…

any one say something even wrong solution
i’ve tried many solutions but nothing worked with me…

i am using CCR+user manager with this micro usb flash drive. OTG cable was very unstable also for me because CCR port is very delicate.
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is the usb flash drive working well with you? if it’s working tell me how did you do is there any way to get it recognized or just plugging it without anything! because I’ve tried with the same ultra usb drive and nothing apparec in the Disk list…

i just plugged it and worked nothing more.