How to fix "The destination is read-only" error on HDD partition

For me the solution was quite simple:

killall nautilus

First I tried with gpart and disk utilities to erase the partition but the problem still there, I saw answers about mount by hand or about win solutions but it doesn't make sense for me because my usb was created with an image of ubuntu with dd!. At the end, it seems to be a nautilus's bug. Just restart your PC or kill your nautilus and the problem will gone.

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/