I've installed elementary OS 5.0 to a /dev/sda3 partition alongside two NTFS /dev/sda1 and /dev/sda2 partitions, whose mount point is set before.
Now, I'd want to delete the first two NTFS partitions and extend the elementary OS partition to the whole disk (not encrypted) through a live USB disk and GParted, and make it bootable.
How can I do that without loss of data?
Thank you.