Add 3.5 hard disk more than pc case specs?

You buy another case or you retrofit the hard drive in the case you want.

if it says it can only support 1 X 3.5 drive slot you then get crafty. I have 2 x 3.5 drives on one of my computers where they case does not support that size at all. I just mounted them on the back plate where you hide all the cables at the rear in that situation.

Velcro and cable ties go a long way.

in this scenario nah they don't get that hot 36c at idle which is totally acceptable and ramps up 10c which is fine. Hard drives don't get that hot to begin with else they would require a cooling solution otherwise. I mean they can get hot but its not usually that concerning.

What i mean was if there was a potential for them to always run hot then they would come with fans on them, because of this then you can mount them anywhere if they are in the stream of flow they benefit from that but it not crucial, As long as the drive is not over about 60c then it should be fine.

there is no difference the size is that main difference its because of laptops initially but 2.5 carried over to SSD because there is no need for big dimensions as SSD is just a series of NAND chips on a circuit board.

docking station is an alternative the speed wont effect anything because usb can do past sata speeds.

You should be able to fit 2nd drive just not in a slot. The back cable area is a valid area. Most cases come with all sorts of strange folds, holes and areas to put things because there is many scenarios with a case. Lots of the stuff is to do with how they press the sheet metal but you can utilize these for parts.

Its common to put hard drives in this area as case design has moved away from hard drives in the front of the case.

All you need to do really is buy some velcro strip online and then velcro it to the cable management panel if there is no screw holes.

A platter drive would logically feel better operated in horizontal orientation but most of them can be put any way except upside down, tolerances would be 1000ths of an inch anyway so its not going to be bad putting them vertically on the panel.
Well they can still go upside down ive done it but its less recommended.

comcom said:

Besides the size difference, what is the difference between 2.5 inch internal hard disk vs 3.5 inch internal hard disk?

Is 2.5 inch hard disk more expensive?

I did not use 2.5 inch hard disk before.

The main difference is performance.
As 2.5" HDD are for laptops and they speed at 5400 RPM because of the gyroscopic effect.
The 3.5"HDD, that are intent to be used on desktops that don't move around, normally speed at 7.000 RPM or 10,000 RPM. That makes them perform better than 5400 RPM drives.

Unless you're looking for huge drives (4 T or bigger) buy a SSD. HDD are dead tech.

And remember, if you add a drive, also increase the backup.