Not all folders can be accessed via USB connection

Hi I need help. I cannot figure out a solution for my challenging problem. If I connect my MIO navigation device to my old Samsung Tab using a USB cable, then all 2 folders on the MIO can be accessed (mio_system and mio_data) from the tab. But if connect the same navigation device via USB cable to my brand new Samsung smartphone (note9) then I can only see 1 folder (mio_system). The same is true for my Samsung S7. Again, from my old Samsung Tab I can see and can access both folders. I used different file explorers and made them show hidden files. Still the folder (mio_data) is not visible. Please help. Thank you!

Perhaps you're not seeing system files beside the hidden files?
Click: [Please Register or Login to download file]

Thanks for your support, BUT: 1. my problem is not windows (both folders are visible in W10) but Android, and 2. the system folder is visible and it is the data folder that cannot be seen. The problem must be (I believe) in the way the old Android version and the newest Android version are dealing (latest Android more restricted?) with the MIO acting as an external memory device.