리커버리영역 재설치문의...

hello? This is a question about the XPS2720 Desktop All In One. I bought it on Ebay in the US this July.

SSD32GB + HDD2TB combination model. After using it for a while, I have a question because I have an inconvenience. 

One). It's slow. Compared to using SSD, the speed comes out by 50%. The speed is better than when using only a regular hard drive, but it is slower than an SSD. Readings come out around 250-280.

2). All files are stored in the C drive, so files cannot be stored. In my case, I reinstall the system about twice a month. Create and use images. If the computer is a little strange, reinstall it as an image. After using it like this, I can't use 2TB on the C drive. I can't repartition...

3). So I bought an M-SATA SSD (256GB). It's in RAID, but I want to reinstall it in ACHI mode, but it's impossible because I'm trying to reinstall it by making a recovery USB. It doesn't recognize the newly purchased SSD. Unable to reinstall. So I did a clean install. I downloaded the driver from the Dell website and followed the installation procedure, but the system is unstable and the driver cannot be installed properly.

4). How can I use the Dell WIN8.1PRO in the recovery area? I would appreciate it if you could tell me how to use it with the original system made by Dell.