DS218+ single hard drive copy setting and data help?

[Enquiries]

I have a DS218+ and when I bought it I could only afford a single 6TB iron wolf NAS/RED HDD. I finally saved up for 2x 16TB iron wolf Pro NAS/RED HDD because they were cheaper on Newegg and wanted my 16TB drives to replace my original 6TB and have a backup. my other back up has been a drive on my computer that I transfer information over the internet. I plugged my new 16TB drive in the second bay and nothing happened so I tried to find the migration or setting that clones my 6TB drive to my new 16TB and can not find it or a good video off your YouTube or others. I was looking at options on my NAS and did add a drive but the 16TB is expanding on my 6TB and did not migrate or copying my old 6TB drive. I am panicking that I made a fatal error and am afraid I ruined the new 16TB drive which is expensive for me. how do I wipe my new drive that is now expandable storage to a copy of my 6TB drive on the 16TB drive then add my second 16TB drive as a backup. I do have some money if I can hire you but I know these processes can take lots of time how much would you charge to help me.

thank you for your time and thank you for all your youtube videos.

[ed]

If you have a RAID group with a single HDD (Basic) RAID option then you should be able to add another drive and migrate to a RAID1 (with 2 drives). Once that is done you can replace the first drive with 16TB.https://www.synology.com/en-global/knowledgebase/DSM/help/DSM/StorageManager/storage_pool_change_raid_typehttps://www.synology.com/en-global/knowledgebase/DSM/help/DSM/StorageManager/storage_pool_expand_add_diskEven though size do not match, all data will be duplicated to a new drive.I hope this helps.