When I open gparted, I got below:

sudo gparted
libparted : 2.2
Device /dev/sdc has a logical sector size of 4096.  Not all parts of GNU Parted support this at the moment, and the working code is HIGHLY EXPERIMENTAL.

Ignoring device /dev/sdc with logical sector size of 4096 bytes because gparted only supports a size of 512 bytes.

/dev/sdc is the external hard drive (WD Elements 3TB).

It seems gparted doesn't work with this hard drive. Any clue?


Try gdisk instead. You haven't said which version of Linux you're using, but it should be available.

Note that because your drive is over 2tb you will need to use GPT partitioning.

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