I've been working on a MAC for years with no problems saving AutoCAD files to a Synology NAS. Recently bought a new MAC, Model: MacBook Pro; Model Identifier: MacBook Pro 18,1; Chip: Apple M1 Pro; Memory: 32G.

At first, everything was running slow, opening a small PDF took 5-8 minutes. We resolved this after changing back to SMB from afp,  the new default MAC protocol.  

For some reason this one MAC out of three continues having issues opening AutoCAD files. They take 5+ minutes to open and impossible to work. 

@ambit8W8T5 

The topic title has been edited to improve findability by @alina.balkanskaia. Original: New MAC slow to open AutoCAD files on NAS