I've Lost Read/Write Access To Raspbian Shares Via Windows

hello all.

I've had OMV installed for a while now and I was usually able to create and edit the folders under the shared drives via Windows. Now I'm unable to with the Raspbian credentials having ownership over the folders. My Windows credentials only have Read access. I imagine the permissions are handled via OMV, but I'm not sure how to proceed. I'm hoping someone can point me in the right direction, please.

Thanks for the reply. They've always been formatted exfat4 I believe. Not readable on Windows, is it?