Increase storage capacity WD WD10000H2U-00 1TB MY BOOK MIRROR EDITION

I have my WD WD10000H2U-00 1TB MY BOOK MIRROR EDITION configured RAID1. I believe I have had this drive over 15 years and now I am about maxed out on space free. I was wondering if I could buy two new disks, swap out the 500gb’s in the unit and increase the storage. Any limiting factors?? Originally there was a 2 TB model so I am assuming replace with 1 TB’s (2) shouldn’t be a problem but could I go larger?? Would appreciate the model numbers of the replacement drives.

Thanks in advance – Cheers !!!

Partition 0
Partition ID Disk #1, Partition #0
Disk Letter G:
File System NTFS
Volume Serial Number 50xxxxxx
Size 465 GB

Hello,

See if the following link helps

After researching the cost of replacement drives I’m beginning to think it might be a better option to just spend a little more cash and buy a 4tb my duo and leave my old my book chugging along as it is. Thanks for the response! Cheers