I am working on a laptop right now and I am able on this laptop to work easily on Sony AVCHD 1080 three camera setups and I have recently been able to throw some Sony XAVC S 4k footage into the mix.(now remember there are much more complex formats around. If that SSD holds your OS/Application that is the right start. If not you need to clone the hard drive to an SSD that 128 GB SSD is a little small but if you are careful about what you put on it. It will be ok. You could check as some GS 60's have room for a second M.2 drive
Now here is how I work quite successfully. I have acquired several Samsung T1 USB 3.0 flash drives which are several times faster than the hard drive in your unit. I put ALL my project files on theT1. Media, Preview Files, Auto Save Files, Project itself. The only thing not on the USB device are the disposable Media Cache and Media Cache DataBase which are on my C: drive and I clean this regularly. Now days you would buy the newer Samsung T3 USB drives and they now go up to 2 TB in size
Thanks a lot. I am in the middle of a discussion with a tech guy. I will look into it. Thank you so much. Wonder why my pc lags on playback - and Premiere sometimes freezes. Yes - I am very careful not putting everything else than Programs itself at the C drive.