Rumor: PS5 announcement coming mid 2019 and more info at PSX 2019

[KBG29]

Pemalite said:

Intrinsic said:

By 2020 and if prices continue dropping as they have been as the industry has fully jumped onto SSD storage, a 1TB SSD could be as little as $80 on amazon. 

It's interesting you mention 2020 and prices continuing to drop... The same will hold true for mechanical drives as well you know.
2tb drives are getting cheaper and cheaper.

KBG29 said:

I don't see a need for external drives late next gen as look internal SSD's will offer more than enough space for 100's of titles. 

If the drives are only a terabyte or two... External storage will still be a must.

Mr Puggsly said:

I don't think the slightly thicker HDDs would be an issue for a home console.

They aren't. It's just a common design choice that Microsoft and Sony take for whatever reason.
Notebook drives tend to have the advantage of lower heat and noise as well.

At the start of next gen External drives will be necessary as internal M.2 Storage would be limited to 1- 2TB due to cost. As we move into the generation, SSD Capacity is expected to make exponential leaps, while HDD has little out look for capacity gains. 

By 2024 or the mid way point for next gen, we will very likely be looking at 8 - 16TB SSD's in the price range of 1 & 2TB HDD's today. People willing to pay $500, $1,000, $1,500 or more will have 32, 64, & 128TB options. 

If Sony sticks with HDD, they will be limited to slow read speeds all gen, and eventuallly they will hit a wall in capacity. HDD is short term gain, mid term loss, and early obsolescence. SSD is a short term loss, with midterm gain, and late life prosperity.