How to fix The destination is read-only error on HDD partition with Windows 8.1 dual boot?
Error while copying to ntfs partition
Ubuntu – How to fix “The destination is read-only” error on HDD partition
14.04dual-bootread-onlywindows 8
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The Windows 10 update reseted it to the default fast startup which is a form of hibernation.
You need to disable this feature (again, probably) in Windows and then shutdown, not reboot. Once done properly you'll be able to access the data partition normally with read/write permissions.
Best Answer
I have the same issue and tried almost everything. Fortunately, found a solution to the problem from this thread : Read-only partition, dual boot WIn10
The Windows 10 update reseted it to the default fast startup which is a form of hibernation.
You need to disable this feature (again, probably) in Windows and then shutdown, not reboot. Once done properly you'll be able to access the data partition normally with read/write permissions.
How to disable hibernate on windows : https://www.cnet.com/how-to/how-to-enable-or-disable-hibernate-in-windows-10/