So I have recently done some updates to my Acer Predator P03-620. I have added 8 TB of HDD to go with my factory 1 TB of HDD. This was possible with the factory data cord that was included in the case. It already had an additional data cord stemming from the same cord that feed the 1 TB. These were labeled P2 & P3. Though, for whatever reason Acer decided to not include an 2nd power cord for future installation. I had to order another SATA power from amazon.
Secondly, I updated my SSD from 512 gb to 2 TB. This was just a standard 3rd generation Nvme type SSD. This was possible by cloning my current 512 gb SSD over to my internal hard-drive. There were lots of different softwares downloadable from google to make this happen. I used DiskGenius as it was the easiest to use.
Thirdly, I updated my GPU from the 2060 Super to the Nvidia 5070 ti. There were only a couple of factors necessary to make my decision. Overall GPU length, slot width and memory bus.