How do I use a usb portable drive to let me add or move files and create folders

I have a 256 gb porable smart drive  USB and need to move some files to another USB 1 TB drive and create a folder on the 1 TB drive for the data off of the smaller one.  When I try to create a folder and using finder it has the new folder grayed out.  using Info it tells me that I only have permission to read the drives but they both worked fine on the windows Laptop.  I guess I need to learn more about Finder.

I guess you're trying to create the folder on the 1TB drive.
Question: Are you OK initializing that drive on your Mac?
If so, you can use Disk Utility (in Applications > Utilities) to do so.

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