
Sharkoon QuickPort XT Duo Clone

Sharkoon QuickPort XT Duo Clone
I had a question about the partition size of the HD. If the source is e.g. 256Gb and I put a 512Gb HD/SDD in the 2nd slot, is the 1st partition 256 or 512 Gb large (i.e. does it make a bit copy or a sector copy). This is not clearly described. If the 1st partition is then the same size, it would not be interesting. I want to use the larger hard disk! Does this only work with MBR /Windows or also with GUID/Mac?