What's the Best Way to Secure an SMB Server Without Sacrificing Performance? or Why Is My SMB Server

Dude, SMBv1 is killing your performance. Upgrade to SMBv3—it’s way faster and more secure. Windows even disables v1 by default now for a reason.

Also, check for network congestion. A crappy switch or bad cabling can wreck SMB transfers. Wireshark can help spot retransmissions or weird packet sizes.

Oh, and if you’re using Windows Defender, exclude your SMB shares from scanning. That’s a common speed killer.