Yes, the memory (RAM), the hard drive, and in the HoloPort+ the SSD are removable and so technically could be swapped out with other components. Currently we cannot guarantee compatibility with any third party parts, however with the motherboards included with the HoloPort and HoloPort+ manually upgrading is feasible.

On the Nano, all hardware is soldered to the board. The HoloPort Nano's internal components will not be upgradable.