Acer Travelmate P645 upgrading SSD and RAM

Hi all
I have an Acer Travelmate P645 , I've some noob questions and I'll be grateful if you can give me some answers

1. Can I replace the SSD because it's only 120 GB and what type should I buy ( M.2 or mSata ) ?
2. About the RAM is it upgradable ? I've 8Gb ( I think it is 2x4GB)

3. I found an 250 GB SSD with price tag of 100$ do you advice me to buy it ?
CRUCIAL / SSD MX 200 M.2 SATA 250GB 6Gb/s
MODEL : CT250MX200SSD 4

Some screnshots :

 

I have the MG version (Haswell i7) but I believe that RAM is upgradable to 12 GB. Mine shipped with 8 GB and a 256 GB SSD. I was also thinking at the time of purchase that I might be upgrading my RAM. I do a lot of video editing with Adobe Premiere (my system has the discrete Radeon 2G graphics engine). But frankly my 8 GB does the trick for me. I think a lot of that is the solid state drive - it really seems to negate the need for that extra RAM - at least in my case. I also have the Radeon card taking a lot of the graphics load, so the system is quite snappy.

So I suppose what I'm saying is that you might want to see - once you upgrade the SSD - if you really need the extra RAM after all. I am not certain, but I had also heard that RAM is much more effective in multiples of 8, and that an upgrade to 12 may not make much difference (while if the system had a capacity for 16, that would make more sense). Maybe someone else can weigh in on that, though.

 

I too am interested if you can upgrade the main SSD without adding an extra SSD, (and also how to get the original restore partition onto the new SSD)!