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You need to mount Ext4 in Windows before you can access its contents. Mounting is technically difficult and requires caution, so you don’t damage or lose your important files. Thus, when you mount Ext4 on Windows, it means that you have given the Windows operating system access to read and process the contents of the Ext4 partition on a hard drive or any other storage device connected to the computer. Simply put, mounting is the process of granting a computer’s operating system access to read and process files on a particular storage device via its file system.
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