transferring of the recorded content on the Humax 150Gb HDD to
an external +500Gb HDD drive, then transferring back to the Humax,
as and when. The manual for the recorder may have a recommendation.
A cheap used HDD could do, may need formatting. Or you could do much the same
transferring to a laptop with spare HDD capacity and take that with you
as well as the Humax.
Likely to be very slow transferring hundreds of Gbs back and forth!