Im guessing you want to use the 6 months deactivation thing to your advantage.
There's really not much else to say other than you're taking the risk to lose the games of the friend account you're using offline. The safest option is to get a second ps4![]()

keeping both with the same fw should be ok, but don't quote me on thatI will keep both HDs with the same Firmware
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Sony Agent told me on the above conversation that it is safe to do that As I discussed it with their official website online support (same Device same serial number same Firmware version)
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but cloning will let my 1 TB HD Read As 500 GB
Did it work?I Have 1 tb HD with games on my ps4 that I play it in offline mode on my PS4
as they are shared games
And I have another new 1 tb HD that i need to install another PS4 OS on it to be able to run and buy games legally
is there any problem to do that ?
both Hard disks has PS4 OS installed and just to switch between them I just connect the right one
1st HD has illegal game share that has to be offline all time
2nd HD i will install the latest firmware on it and I will use it as very legal device to be able to buy new games digitally
be noted that both hard disks will be used on the same device and I will just plug and replug the one that i need and also be informed that one of them will be have april 2016 update and the other will not
so any data is recorded on the internal RAM or Bios or Flash of the device will detect that Or may cause a problem to me
so please support me if you tried that
thanks in advance