New user questions

[jackhandsome]

I have now downloaded and watched a few of the video tutorials now but have a few questions. I have bought a WD 10TB (single drive) external drive to backup my 2 internal drives in real time. I used to have a 6TB WD drive and used WD Smartware for real time backup. The new 10TB drives only support WD Backup which does not back up in real time. I currently have my internal drives mirrored to my external drive but want to use FFS for a real time backup solution. I watched the mirror video and followed it to ultimately create a batch job to run in RealTimeSync. I hit the synchronize button and it was going to take 18 hours and was going to copy over 3.58GB. I immediately hit stop because it definitely shouldn't take that long. I assume it was maybe starting from scratch so I am wondering if I need to just format the external drive and start from scratch? Am I going about it the right way? Thank you in advance.