>Second question below (if you know): is this a setting on the server or on the client side?
>
>And it will improve performance? Odd since this seems to be a caching thing (but what do I know).
>
>Thanks.
>
>>As with everything in this industry, it depends on what you're doing. Turning it off will improve VFP performance.
>>
>>>Hi Craig,
>>>
>>>I wondered about that. When reading about SMB, there seems to be various opinions out there - some say "no effect" and others seem to indicate to turn it off.
>>>
>>>For my info, is the setting for this on the client machine or on the server or both?
>>>

With any unusual file system or network behaviour, the first thing to check is antivirus. In every Win10 upgrade I've seen so far, if the system was previously running a 3rd-party AV suite, that suite required an upgrade to a Win10-compatible version after the Windows upgrade.

Folder locations that contain VFP data tables, as well as the VFP temp files folder should be excluded from real-time AV scanning.

To see if this is an issue, you could try temporarily turning off real-time AV scanning on all workstations accessing your VFP data, plus the server.

The "SMB issue" has to do with reliability, not performance. For an overview see Message#1620274 .