Thanks Oxygen8. I'm wondering why the built-in updater thinks 1.73 is the latest version. Also, in searching this forum, I see people reporting things like NAS hanging, timing out, Bittorent (which I don't use) not working etc... after applying 1.74.
All of this came up because I got a new PC with the latest v of Windows10 on it, and it wouldn't "see" the NAS. This lead me to believe I needed SMBv2. However, without me upgrading the firmware, suddenly last week it COULD see the NAS. I have no idea how or why.
Deeper reading on the forum today seems like you must do some command line configuration changes to enable SMBv2, which might be beyond my skillset.
http://forums.buffalotech.com/index.php?topic=24630.0