it has two NTFS partitions, because I'm not connect it to any windows computer I decide to change the partition format to EXT4. it's my idea to do that:
install gparted, create a new partition with the free space of sdb1, then move some data to the new partition and resize partitions again and again until I just have an EXT4 partition.
I made two steps in gparted, 1:resize the sdb1, 2:create new EXT4 partition.
I got error at 100% of first step.
now I can't mount the first partition in Linux. I tried ntfsfix it shows operation finished successfully but really nothing happened.
when I connect it to windows to use chkdsk, windows detect that it's connected but the external drive is not showing in This PC(My Computer).
in disk management I see the hard drive but none of partitions has a letter(D, F, ...). if I assign a drive letter and use chkcsk D: /f I got this error
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The type of the file system is RAW.
CHKDSK is not available for RAW drives.
I selected deep search and it took about 4 hours, when I back and check the laptop I see something like this in my terminal invalid FAT boot sector
I need my data in that partition, it's a 380 GB partition and about 200 GB is full. it's important to first access to data and then change the partition format.