Expanding SSD partition.

[Skywatch]

Hi,

After getting ssd's for a couple of pi3 installs (to eliminate sd card) I decided to try it on the pi2 running xbian. It still 'boots' from SD, but 'runs' from ssd. Works well, fast and hopefully less data corruption.

Trouble is, I only copied the partition across from usb stick to ssd and that leaves a lot of unallocated space.

Is there a way to expand the root partition to make use of this? The sd card expand in config doesn't work for ssd, nor can I expand it with easeus partition manager. I've seen a few web pages with differing how-tos, but don't want to mess it all up!

Anyone managed to do this and can share the secret please?