I leave my PC on 24/7, only off occasionally. So far no problem with my HDDs

Thinking of getting a 2TB and selling off one of my 1TB HDD. Which is better, internal or external?

Currently i use my laptop more than my desktop, so I'm thinking of putting my movies/series/etc into external, so I can access it anytime and anywhere i want, without needing to turn on my desktop always. Guess it would be easier to share with others too

But the price difference between both the internal and external still makes me consider, which one to go for

hey guys, I'm having a problem with a WD Passport 1TB external.

When I plug it in to my laptop, it detects and installs the driver. It's seen in the device manager, but not in the drive management. After opening drive management it asks me to initiate the device using MBT or GPUID, but then it fails, saying I/O error. The hard disk is spinning, and light is blinking. Any other ways to save it?