SSD install

Do you have a hard drive in this PC too? If you're storing all your personal data files on the SSD, you could move them onto the HDD to free up space on the SSD.

There are ways to make Windows move its default folders, eg Documents, Photos, etc, onto a different drive, rather than storing them on the same drive as the OS (C:) so Google for instructions to do that for your specific version of Windows.

Many apps have their own settings for where to store their data files so you can change that from the SSD to the other drive. Some apps may allow you to install them on a drive other than C:, but you'd have to uninstall them first and reinstall them on the other drive. Be sure to back up your data files before you move any apps off C: onto the other drive.

Thanks for the info on relocating default folders. My question was no that. My C drive is a small chip on the motherboard. it is only 300 Gb. If I remove that chip, and plug in my 900Gb Sandisk SSD, will it work? Or does the motherboard want to see a chip in that slot?

The 8700 supports an MSata drive (about the size of a postage stamp) on the motherboard along with up to 4 additional Sata drives.  Yes, you could purchase a larger SSD drive and move the contents from the MSata drive to a new SSD drive using a product like Acronis and a USB adaptor (such as StarTech USB 3.0 to 2.5" SATA III Hard Drive Adapter Cable w/ UASP - SATA to USB 3.0 Converter for SSD/HDD) made for cloning from an existing drive to a new drive.  You would then remove the MSata drive and install the new drive and boot from it instead.  

You can also keep the MSata drive and add the Sandisk as a second drive and use it for additional storage.

So ...I can pull the chip on the motherboard after I clone it to the new SSD, and it will boot from the new SSD and become the C:\...correct?

Yes - I did just that a couple of years ago and switched over to a Samsung 850 Pro.  I recently gave that PC to a son.  I also found an adapter online that allowed me to put the MSata drive into a standard SSD size drive and use it to upgrade the old spinning harddrive on my wife's laptop.  Made it like a new PC. I used the same cable to clone the spinning harddrive onto the replacement.

you can buy a new SSD disk which has the same type of chip with old SSD disk and clone SSD to larger SSD ( www.backup-utility.com/.../clone-ssd-to-larger-ssd-4348.html ) using disk cloning software and USB adaptor . However, you can  there is a geat risk to damage your motherboard if you are not famiar with this operation. Thus, you'd better ask a professional for help.