I'm not sure what's going on... I'll insert your image here in hopes that you will get something more helpful from someone else more knowledgeable about hardware.
I see 2 physical hard drives, drive 0, and drive 1. Drive 0 that has your OS on it, has a capacity of only 119.24 Gigabytes, and Disk 1 has a capacity of only 3.64 Gigabytes.
Can you tell us what type of drive the one labeled "disk 1 exchangeable" actually is?
What physical drive you expect to see the other drives on, what did the configuration look like before you installed Windows 10?
How big a drive was it?
One of the other people here should be able to give you some help.
I called Microsoft and they told me to update my drivers, i had to take contact with ACER, i did that and ACER told me my laptop is not compatble with Windows 10, my computershop told me to buy 2 new HDD and then it should work Chris
If Acer say your computer is no good for Windows 10 then imo getting more harddrives will not help... its only 700mb (300 of which will be lost on new drives anyway) in any case and thats not worth spending $ on but it's your money so good luck.
I agree with usnorway, on this. By the time you buy new hard drives you will have spent a good part of what you would have to spend for a new computer.