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But after reading more about this , I think I’m going to just not get the 2012
Use a VM on the m4 like parallels (I’ve used this before) or something else.
Run the VPN+torrents in the VM, that shouldn’t interfere with plex
I hope
This will work fine, I've been doing the same since the M4 Mini launched (but using UTM instead of Parallels ... I'll save my Parallels licenses for things that actually benefit from them)
 
Why not just share the screen and copy and Paste? I do it all the time with my Wife's MX 2 Studio. I drop them in what ever folder I want. Even to external drives that are mounted on her desktop.

I am not an expert but this works really well for me.
 
This will work fine, I've been doing the same since the M4 Mini launched (but using UTM instead of Parallels ... I'll save my Parallels licenses for things that actually benefit from them)
Using VM is what I do. You can run VM with vpn and have a choice of OSes to run. If you do not want to pay for Parallels, which has nice integration I have tested and used for some time VMwave Fusion. Free at this time and works quite well. No Coherence as in parallels, but no cost. Have VMs with Windows and Linux and can do what I want with them withotu impacting the mini. Beefed up mini M4 to 24GB RAM and it is working shockingly well.
The advantage is that there is no file transfer. VM is mounting external SSD where all data are saved and both Mac and VM sees the same location with the same (=fast) speed.

In the end, it is actually simpler and very power efficient.
 
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