Factory Reset DSGW-081 6

Hi. I have a dsgw-081 6 . i need to do a factory default reset. I cant do anything with device because , it says no more storage. The Reset button doesnt seem to perform factory default . i tried to upload new firmware through ssh but i cant upload the img because of there isn’t enough space on the device. Please advise .

First , check the directory /var/log to see if there’s too much logs occupying disk space.
And try to remove logs and some unnecessary packages in the file system.
Refer to this , section 5.2.3 or 5.2.4 if you can save some space by removing files, section 5.2.2 if you can’t save space.

Here’s the newest firmware.

Thank you. Removing the logs Worked out.