I have a 4TB MyBook that was fully functional for 3 years until this last week, it was Read Only on my 2 Win 7 machines, but had full function on my Win 10 & 11 machines. Following the recommendations on this site I reloaded the Paragon S/W by clicking the link in Discovery. No change. Seeing that other had the same problem and not seeing any resolutions posted, I bought a Seagate 5TB. Upon connecting the Seagate to my Win 7 system, PnP downloaded a driver. The Seagate worked properly. I then reconnected the MyBook drive and low & behold it had write capabilities.
It would appear that the driver that PnP installed was what was needed for MyBook. Searching the all the Windows event files I was unable to see a name for the driver that Seagate installed. The log entry does show me name that was pulled down, but that name was just a win ID.
I know that the MBR has a limit of 4TB drives and that different drivers are need to use GPT, however my Win 7 systems have been writing to the MyBook for 3 years. I am also aware that native Win 7 starts to have intermittent problems with MBR drives over 2TB. But I don’t think all that is relevant to this situation.
My problem is solved, I only post this in case it helps anyone else that has this problem.
