Trouble Downloading The Sims 4 on Flash Drive

Chloe_isboss12  Try manually uninstalling and reinstalling the 2022 VC++ runtimes, which Sims 4 and the EA App both use.  Hit Windows key-i, select Apps, scroll down to the Microsoft Visual C++ Redistributables, click on any version from 2015 or later, and select Uninstall.  Don't touch the older versions.  You can download the newest runtimes directly from Microsoft:

https://docs.microsoft.com/en-US/cpp/windows/latest-supported-vc-redist?view=msvc-170

You'll need both the x86 and x64 versions of the 2015-2022 runtimes, but you can skip the ARM version, which is for a different class of device.  Restart your computer after installing the runtimes and before trying to install Sims 4 again.

If that doesn't help, how is your USB formatted?  You can check by clicking Windows key-X and selecting Disk Utility.  If it's FAT32 or exFAT, try formatting it as NTFS instead.  This will erase the drive, so move anything you want to preserve elsewhere first.