Can you play sims 4 with an external hard drive?

@REOFOX08  You could certainly install Sims 4 on an external hard drive.  How well it would work would still depend on your computer's internal components though: processor, graphics card, memory.  And playing from an external drive would be slower than playing from your internal drive, perhaps by a significant amount depending on how fast the internal drive is.

If you'd like to get a general idea of how your computer might handle Sims 4, please list the internal components I mentioned, or even better, run a dxdiag and attach it to a post.

https://help.ea.com/en-us/help/pc/how-to-gather-dxdiag-information/