Hi.. Dunno if anyone encountered the same problem as me. I have a 2TB hard drive by WD. I use it to connect to my Smart TV (watching movies and listening to music) and also onto a MAC at work and Windows Laptop at home. It recently went corrupted and I was unable to access the files on any of the computers plus was unable to see it on the Smart TV. But I partially resolved it with Command Prompt. Now it's working on Windows OS. But still invisible on the Smart TV and MAc. Any ideas?On a MAC? On a PC? Same drive?   

How valuable is your time?
My best advice to you is to get another portable mass storage device and put your movies on the new device.

My reasons? Any attempt to repair a corrupted huge portable HDD USED by two disparate systems is a real can of worms.

Here is a general reference about the issue here.
https://www.digitaltrends.com/computing/how-to-share-external-hd-mac-windows/
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A less obvious, but possibly the best solution to using a hard drive with both Windows and Mac without the use of third-party software would be to create two partitions on the drive, on for Windows and one for Mac. This essentially tricks the computer into thinking there are multiple hard drives connected to the computer at once despite there only being one.

EDIT: Anybody can now buy a good 256 GB USB thumb drive for under $35.