I was able to copy my Roamio OTA 1TB drive to a shucked WD Easystore 12TB and expanded the recording space with the mfsadd command 4 times following the instructions in the DIY 10TB Roamio thread. I also leveraged mfsinfo to verify how many more times mfsadd could be ran. On the final fix I was told the drive would need to be divorced. Very nervously I reinstalled the drive and followed the onscreen prompts. Once this completed I attempted to perform a KS 58 but not sure if this worked or not. Everything appears to be working (less than 1 hour in), I went from I believe over 80% full to 7%. Total cost was less than $162 with the purchase of a deeply discounted 128GB thumb drive after redeeming $50 of Best Buy certificates.