QNAP NAS OS Drive upgrade

[Enquiries]

Hello...I have a QNAP TS-653D with a QNAP QM2-2P-244A card in it. Currently only one of the M2 slots is occupied. That M2 drive is my "OS" drive for the NAS. I am looking to purchase a second M2 drive (same make and model) to put in the second M2 slot. I would like to Mirror the 2 M2 drives...can this be done without losing any of my current OS data? Or would it be best just to start from scratch with a fresh build?
thanks,
Pat

[ed]

Yes, Qnao allows migrating from basic mode to RAID1. https://docs.qnap.com/nas-outdated/QTS4....B255C.html
This would be crucial if you run system on this.

I hope this helps.