Be VERY careful how you setup raid. Backup all info if you can because it would be very easy to set up an array and while its "building" the array it is actually formatting the drives.
Promise can supposidly copy drives but all ive used will wipe out everything and STILL take a half hour to "duplicate" the drives.
I am not entirelly sure of highpoint as I have never actually set it up using this.
Make sure if you have a SATA that you get the same speed and size, preferably the same drive model itself. In any case BACK UP EVERYTHING before you try just to be safe.