Yes, easiest is copying files:
internal WinXP capture HDD > external HDD > Mac
But details matter.
- max 2tb allowed in XP
- USB3 is an option with added PCIe USB3 card, but still 2tb max
- Mac needs to read NTFS
Another option is the 10 GbE (10gig ethernet) -- something I want to do, but haven't. The benefit here is no middleman "hdd > copy > copy (again)" for file movement. XP is a PITA to network, however. So you'd want to "dual boot" (physically switch boot drives in Win system) from WinXP to Win7/10. I'm actually looking into a boot switch myself, for other reasons, Kingwin has one on
Amazon.
NOTE: This needs to be an air-gapped network, too! Not online.
I use Linux desktops daily. Great OS (Xubuntu and Mint). But rsync not needed, and it's mess with captures.
So 2tb USB3 drives, about $65 from Best Buy from their
eBay store. I'd just get one for transfer needs. Maybe a couple more if you plan to process off the drive directly, saving to the new location.
I really had hoped XP Integral would have allowed my 5tb Seagates, but nope.

^ This is why I want to dual-boot XP/10, but again a physical switch.