Transfer speed from Xbox one S to Series X

Yes, you can transfer the Xbox One data to the Series X|S version. Instructions here https://support.rockstargames.com/a...-Xbox-One-to-PlayStation-5-or-Xbox-Series-X-S

What games are you transferring? Which consoles are involved? If it's transferring from, say, a Series X/S to an Xbox One, then it may be because the games are S/X versions.

As to the expansion pack, I believe that is only available to the account that bought it and the console that account is on...it can't be transferred to another account on another console

Hi,

Can you tell me the model of the drive?

Most external drives won’t work on series X/S consoles due to transfer speeds.

Hi,

The port on the rear Series X and S console for the 1TB expansion card is a custom PCI Express 4.0 port. The expansion NVME SSD is capable of raw speeds of 2.4GB/s and faster when appropriate compression technology is used. This is considerably faster than the 500MB/s of a SATA to USB 3.1 SSD drive attached via USB

So, in answer to your question, no, they're not fast enough. Not only due to the lower speed, but also due to I/O overheads associated with the USB data transfer and the fact that these drives are not fast enough or compatible with newer data compression technique used for the Series X|S titles.

You can install regular un-optimised Xbox One games on an external SSD and benefit from the increased speed over slow mechanical hard drives, but you can't play Series X|S titles on them.

No such thing as an Xbox One Series X. The Xbox One family of consoles has an S and an X but are still just Xbox Ones. You need the Series family of consoles. The Xbox Series S or Xbox Series X. These are different from Xbox One S or Xbox One X.

The "One" and "Series" are the console types.