I've been running into trouble recently with a NAS device, Seagate 5TB storage system with a Linux back-end. Whenever I connect to the device with an AFP connection, the drive connects with no issues, and I can browse files and folders with ease. After a while though, Yosemite decides to mount another version of the NAS using SMB. This SMB connection is riddled with issues; folder names show off an old 8.3 NTFS name, and sometimes they cannot be changed.
How can I stop my Mac from connecting an additional SMB connection the NAS?