cant edit my gcode on syntec controller

[ali789]

Suddenly, when iam editing my code on the machine, nothing changed or even typed.
when going down to the end of the code, i found "read only file".
plz help, i dont know how to disable this thing, i am in need to edit my codes.
Note that the file on the computer before importing it, its not a read only file. so the problem is after importing it to the machine(syntec controller)
thanks for your help

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[Danpil]

Can you doing screenshoot?

[ali789]

this is before the problem
this is after the problem
NOTE: i am importing it directly from the PC using network(ethernet cable)