I am running: Tomato Firmware v1.28.7511 MIPSR2Toastman-RT K26 USB VPN-NC Built on Fri, 20 Jan 2017 22:13:11 +0700 ...on an Asus RT-N16. I have a Samsung G3 Station external 2G hard drive hanging off of a USB port, with the main NTFS partition shared. "Spin down each HDD when idle. No need to use with flashdrive." is unchecked, as the thing spins itself down. (Way too much, apparently.) The drive is used sporadically for internal transfers mostly, although there are some media files there rarely accessed by computers and Android set-top boxes. Every few days that drive will completely disconnect, not visible in "USB and NAS," and require a USB replug to make it visible again; and it can be days before I realize the drive is offline (not used much). Of course, since I have Bandwidth Monitoring and IP Traffic Monitoring both set to save history and create backups to a folder on that hard drive, rstats and cstats both lock-up if the drive goes offline and I lose the data from that period until I notice and re-connect the drive (at which point it auto-mounts). I plan to move to Comcast, so maintaining this data is going to be vital to keep them from screwing me over with their bogus monitoring, so I need to get this fixed. I suspect the problem is not in the router firmware (although you folks would know better than I), and rather in the G3 Station firmware (which I always thought was too d*mned smart for its britches; won't spin-up unless both the power and the USB are live), but I 'm not sure. Far as I can tell, my choices are to 1) live with it as-is, 2) somehow fix the existing configuration, 3) replace the G3 Station with another external drive (maybe a bare-drive dock?), 4) stick a flash drive/memory card reader in the second USB post and backup bandwidth logs to that instead, or 4) buy an external NAS and backup the bandwidth logs to it instead, bypassing the router's USB/NAS completely. Would appreciate any suggestions.