Does partitioning or formatting a partition on an external hdd on ubuntu erase the whole disk?

I have my external HDD formatted as ntfs for windows as i have dual boot and it has important data on it in addition i have plenty of empty space on it and wish to use part of it for Linux usage, so my question is whether formatting a partition as ext4 erase the whole disk i already have an empty partition of about 100gb.
thanks in advance.

Asked By: Ahmed Salout

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Formatting a partition as ext4 only formats the selected partition. It does not erase the whole disk.

Answered By: karel