I would be surprised and disappointed by a soldered hard drive in the PC world. What I expect will become common is M2 SATA or more likely NvME. An M2 drive is approximately the size of two sticks of chewing gum and are commonly available in 1 TB capacities. Of course the PC's motherboard must have the appropriate connector and BIOS support.
Edit: Holy Cow! I was browsing Amazon and Inland (of all manufacturers) is advertising a 4 TB M2 2280. Inland drives are typically value propositions. I have a couple Inland SATA drives, they're middling performers but seem reliable.
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