Need to send back One X for Series X all access

To clarify the issue of mailing back hardware, the point of All Access was originally to allow people tp buy an Xbox One on credit and then return the One to upgrade to a Series S/X without further charges. You can also just buy a Series S/X through All Access and wouldn't need to send in any hardware. The 34.99 charge includes both Ultimate and the monthly payment for the console.

I take it you have an original Xbox One? Just trying to work out why you need a Series X/S for 4k play?

As to finding a Series X, best bet currently, as noted above, is via All Access (or being very quick when stock notifiers say they are in stock at wherever)...I got one a couple of weeks back via All Access in the UK

So this is alot going on here and I'm a little confused. Is merchant telling you to rebuy plan or is it XBox/Microsoft telling you to do so?

This is the info I've found:

How much is Xbox All Access?

• Xbox Series X bundle: $34.99 per month for 24 months
• Xbox Series S bundle: $24.99 per month for 24 months
• Xbox One S bundle: $22.99 per month for 24 months

There are currently three Xbox All Access bundles available: Series X, Series S, and One S. The One S bundle is $22.99 per month and comes with the console and 24 months of Game Pass Ultimate. You can buy this
bundle right now at participating retailers, and after 18 months, you can upgrade to a Series S or Series X (jump down below to learn more about that).

The Series X All Access bundle is $34.99 per monthly, while the Series S bundle is $24.99 per month, and both come with 24 months of Game Pass Ultimate. The lineup is straightforward, and thankfully,
that’s a good thing. There isn’t anything hidden when it comes to cost. You pay the subscription price for 24 months with 0% APR, so long as you make all of your payments on time. Furthermore, there’s no upfront cost, so you can pre-order
the Xbox Series X and Series S now and not worry about paying until the console launches.Before getting too deep, it’s important to reiterate that All Access is a financing option, not a subscription. In the U.S., Citizens
One provides the financing on behalf of Microsoft. That means a few things. First, you’ll need to be legally able to apply for a line of credit in a participating country and pass a credit check. As is the case with all lending services, Citizens One doesn’t
make it clear what determines eligibility, so the higher your credit score, the better. Additionally, if you’re approved, Citizens One will send you a bill each month asking for payment. If you’re late or miss payments, you’re subject to interest (more on
that below).

Upgrading a previous All Access subscription
If you’ve previously used All Access to buy an Xbox One X or Xbox One S, you can upgrade to one of the new consoles. There are some stipulations, however. Of course, you’ll need a current All Access subscription,
and all of your payments must be current at the time of upgrade. You’ll also need to have paid the equivalent of 18 months on your current console ($413.82 for the current Xbox One S bundle). If you purchased an Xbox One X with All Access before December 31,
2019, you’ll only need the equivalent of 12 months of payment.

The unfortunate news is that you’ll need to send back your current console to upgrade to a Series S or Series X. At nearly the full purchase price, it’s a better idea to pay off your current All Access subscription
rather than upgrading (you’ll recoup a decent amount of money by selling the console rather than sending it back, anyway). If an upgrade is what you’re after, though, you can check
your eligibility.

So Im still not sure on your side

https://www.digitaltrends.com/gaming/xbox-all-access-price-pre-orders-retailers/

Fair enough, a slow internet connection is as good excuse as any.

Be aware however that while that drive will work on Series X, you won't be able to play Series X games directly from it. Series X games will require faster access and read speeds. My understanding is that the Series X games can be 'backed up' on an external
drive and then need to copied/moved over to either the internal SSD or the External SSD's that will be available for the machine.

The Series X will read and play Xbox One games from an external drive though.

1. Yes the Xbox One controller will work fine on the Series X console.

2. No

3. If you purchased the console from your local retailer, then you will need to take all of it back for an exchange, or you could send the controller back to Microsoft for repair.