I apologise if there is an answer already - I haven't found one.
I am editing in FCP X and am currently using a Desktop WD 4TB HDD for editing. Majority of my footage is in 4K but the HDD rarely has problems playing the 4K playback. Rarely I need to optimise footage. I do have another same desktop HDD for back-up purposes only (not used for editing)
I want to purchase another one (third one) to triple my safety net of back-ups (recently some other older HDD's died) and I was wondering if I should go for Desktop or Portable.
Is there any difference between the two in terms of editing a heavy 4K workload? Portable would be preferable so I could take it to other meetings/locations and edit on the go, but I would not want to purchase if there is a disadvantage in writing/reading speed, slower RPM or anything else that might make it disadvantageous over the desktop one.