Problem with Google Drive was that I had to use multiple accounts, and eventually Google started wanting me to have a unique phone number per account. I guess I could pay for one large Google Drive, but that’s even more cash. Cheapest would be splitting it across three low-cost Google Drives, but then I might hit the same issues.
TCW:R is 166GB (and growing), and my total fanedits are 250GB.
I haven’t ever attempted to share the amount of data associated with a fanedit with multiple people, but I use Microsoft OneDrive. Because I already use Microsoft Office on the daily, the Microsoft 365 Family Plan subscription made the most sense. Not sure what your budget is (if any), but it’s $9.99 a month or $99.99 a year. It includes 1TB of Microsoft OneDrive storage per email address on the family plan. I believe the limit is 6 email addresses per family plan so you could potentially have 6tb of storage. It seems to be more cost effective than what Google charges for the same amount of storage plus you get Microsoft Office included as a bonus if you need it. I haven’t looked into any download bandwidth limits though which might be why other editors don’t use it, but it might be worth looking into if it’s in your budget.