I have to join the discussion.
Since last April I have been putting 2TB SSDs from m4-SSD chinese site into M4 minis, the non pro ones. They also have drives for the pro version. I did 5 times the 2TB dives and once the 1TB drive in a base M4 configuration.
In couple of days I will be fitting another 1 TB drive into a friend's M4 base. My last 2TB card is also already reserved by another client of mine.
All i can confirm is that I didn't have a single issue, so far, with any of the drives or the minis after the upgrade.
All are working flawlessly, SO FAR !
I didn’t test iboff or ebay sellers. or ally Express. I order my drives from M4-SSD.com directly.
I have seen on the iBoff webpage that some of their 512GB drives use 2nd hand nands, while bigger ones use brand new ones. This is off putting in my opinion.
I hear often that people are afraid of storage updates, so I try to convince them otherwise.
Going back to m4-SSD.com case.
My Youtube video from the first mini upgrade is featured on their 2nd webside:
We build third-party SSD upgrade kits for Mac mini M4/M4 Pro—solder-free, cost-effective, and easy to install. Orders over $199 ship worldwide for free. All modules use brand-new chips and include a one-year warranty.
m4boosthub.com
Mine is the Hime Hardware one.
M4-SSD told me that they check every single drive before shipping.
So far I have no reason NOT to belive their words.
3 of those minis I upgraded were brand new ones I bought straight from Apple's Polish reseller and performed the swap right away. The config of 24 GB ram and 2TB SSD is the sweet spot IMO.
Take care.