External ssd on ps4 are there any differences between external and built-in?

Will Dayz play without it always lagging when I shoot etc.

I need an Ssd for that.

Is it worth it to get an external ssd?

So that fulfills the same purpose as a built-in ssd?

Except that it is external

Slower

In principle yes. But you have to make sure that the cable allows the amount of transmission.

It's worth it because you can also connect it to a nh PC or a PS5, etc., if you don't feel like the Ps4 anymore.