Cannot add files to external hard drive
Hello,
So I have a Lenovo 1TB harddrive. It's format is Windows NT File System (NTFS). I have no idea what all these mean, but I've been researching all over the place and can't seem to find an answer. So I used to have an old 2016 MacBook Pro in which it worked fine. I could backup my files all on here. But recently got a 2019 macbook pro and this hard drive won't let me add files into it. I can read and take files out to my desktop but cannot add anything in.
I got another 8 GB USB and that works fine.
If anyone knows how to fix this, any help is greatly appreciated.
MacBook Pro 13”, macOS 10.14