How to choose an SDD for a laptop?

Question

laptops

If I understand correctly, then you can give an old 7-year-old laptop a second wind by replacing the HDD with an SSD. My main complaints about the work of the laptop is that after rebooting and the appearance of the desktop, you have to wait another 2 minutes for everything to be postponed, and all sorts of simple things like transfer files from one place to another, find something through the search, etc. are accompanied by either brakes, or for a very long time. Also, the browser sometimes lags, and this is unlikely due to lack of memory, since usually it shows no more than 70% memory load in the manager, which means that the HDD is probably also outdated. He stood all 7 years here.

I want to take the cheapest SSD, tell me if the next two models are normal, otherwise I’m not technically savvy at all and I don’t rummage.
1) Kingston SSDNow A400 120GB, 2.5", SATA-3 (SA400S37/120G)
or
2) Transcend SSD220 120Gb SATA-3 6GB/sec (TS120GSSD220S)

#1 popular in retail stores and many reviews. But #2, for the same price, has a higher write speed (420 Mbps versus 320 Mbps for #1). But maybe #1 has a more reliable / more popular brand, or what? Will they definitely fit into the drive? They have dimensions of 70x6.8x100.

The model of my laptop ASUS N56VB, if anything. I looked at the HDD model in the task manager, it says on the Internet that it is SATA 3Gb / s. And the SSDs listed above are SATA-3, and my HDD is just SATA (1), I suppose. But I'm not instead, and in addition I want to put it through the drive, will it work?

I want to leave the old HDD for all sorts of serials, and put Windows on an SSD, and if I understand correctly, instead of the drive that is present in the laptop, you can insert an SSD through some kind of "adapter". What do you think, will I be able to insert an SSD there myself, if I have never poked around in a laptop / computer in my life, or is it better to give it to a workshop?) I just know for sure that my model is very difficult to disassemble due to the stupid design of the cover, but for drive, it seems, you do not need to completely remove everything.

PS I read on the internet and found comments that the SSD should not be placed in the disk slot, because the speed will be lower than that declared from this. If I put the SSD in the place where the HDD is, will my HDD fit into the drive?

Answer 1

Put the SSD in place of the HDD, and the HDD in place of the drive.
And it's better to put a 250 GB disk.

Answer 2

https://www.asus.com/Laptops/N56VB/specifications/
1) ssd samsung evo 960
2) add up to 16 GB of RAM
3) you can set the percentage to the maximum speed ..
and you will be happy)

Answer 3

The larger the ssd, the faster it is. Those. A 500 GB Transcend will be faster than a 120 GB Transcend. And 120 may not be enough ... It's better to take at least 256.
As for speed - I doubt that in an old laptop the disk will work at maximum sata3 speed, therefore, comparing their speeds not sure if it's correct.

Answer 4

Today I bought and installed in a samsung RV511 (rather old) kingston A400 240GB for 2800r in the CSN. Flying is great! Win7 x64 in 15 seconds loading, responsiveness on top. And this is with its 500/350 MB / s read-write (stated). Previously, I installed the A400 at 120GB both in computers and in laptops - there were no problems either, everything was fast enough.
However, if there is something around core i5, then again everything will rest on the speed of the disk - here it’s better to take something faster.
So I would put the A400 240GB in a regular place, and instead of a drive - hdd. In my opinion, the best option in terms of price-quality ratio.