On my other Dahua cameras, the SMB/NFS/FTP setting is under "storage". But on the IPC-Color4K-T, the storage menu is only for configuring the onboard microSD card. Is there no network storage feature on this camera?
Click the "home" button next to IP camera, then click the record button in the lower right hand corner of the next screen. Then you should see the last "tab" that says storage, which will lead you to this. I just started testing some of the more advanced features of the camera, since right now I'm just using BI4 and motion detect areas, which has been sufficient for me for years, although I tolerate the down sides of just regular motion detect. I'm recording from the camera direct to a NAS via FTP. I also just noticed there is an option in the drop down list under the second network storage that says "NAS", I haven't investigated that yet.