Indeed, Mac's can't write to an NTFS formatted drive, unless you buy some extra software. http://www.howtogeek.com/236055/how-to-write-to-ntfs-drives-on-a-mac/ tells more. That might be the preferred route.
If not: having no backup of the data on that external hard disk means you will lose them sooner or later. Why not go ahead and lose is now?
If you prefer to keep that data and format the drive to another filesystem:
- First make a backup of the data on that external drive. Preferably two backup copies.
- Then format it.
- Then restore your backup.
- Then add the files from the Mac.
A nice alternative is to buy another drive and use that for the Mac. But of, course, we still recommend making a backup of both your NTFS and your new Mac drive, if you plan to store data on it in stead of using it just a backup.
Hello;
i have WD external hard devices. . i'm trying to copy files into my external hard drive but it's not working. I made some research,I found out that I have to format my external hard drive. Unfortunately, this is not possible for me because I have for about 1Tb on it.
My question is, is it possible to transfer files into my external hard drive without passing through the formatting process?
Thanks.

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