Anyone seen prices for the extra 1tb storage?

I only see this issue being for the series s, 1tb built in and a usb drive would be very liveable as that's what I'm running one my one sad, but 512 would mean a lot of swapping things out to the the usb drive. I'll be interested to see how fast you can move from an external SSD to the internal SSD and if you can include the instant resume state in that data transfer.
Just part of me thinks by the time you spend £250 on the console and potentially buy the drive if it's over £150 you might as well go for the series X if you can afford one and get the double sized internal drive from the off. The hard drive is the main factor making me think the series X may well be the better buy.
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