@jennifer88665 The 64-bit version of Sims 3 is Mac-only. Windows can still run 32-bit apps, including Sims 3, so EA hasn't updated the Windows version yet.
The laptops I linked are right on the border of what hardware can run all Sims 3 packs together on high graphics settings. I got a detailed report a year ago from someone with the same processor and graphics chip and who's played Sims 3 for years, and she said she noticed absolutely no performance issues on ultra settings with nine of 11 expansions installed, then need to turn down a couple of settings with the last two EPs. So I can't promise that performance will be perfect, but it should be at least good enough.
The other consideration is that the next step up would be a gaming laptop, and that would push the price to around £650. So if you'd prefer to stay around £500, I think this class of laptop is a good bet. If you do need to make compromises to run all the packs together, those adjustments will likely be small and not particularly detrimental to gameplay, for example turning down tree detail or disabling wild horses when you don't actually intend to have your sims befriend one.
I do think if you're installing both Sims games, you'd be better off with 512 GB storage rather than the 256 in the Samsung. But you can certainly fit both games and plenty of user content on a 256 GB drive; you'll just need to keep an eye on the computer's free space and adjust when necessary, like deleting old saves or offloading data to an external drive.