When I plug in my External WD hard drive, open Pantheon and click on the "My Passport" drive on the left side under devices, instead of seeing the files on the right side pane, I see this (screenshot)
App Versions: * Pantheon Files v0.3.0.2 * elementary OS 0.4 Loki (64-bit)
Below are the relevant Syslog messages:
[12957.767064] usb 2-1.4: new high-speed USB device number 4 using ehci-pci
[12957.922325] usb 2-1.4: New USB device found, idVendor=1058, idProduct=259d
[12957.922335] usb 2-1.4: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[12957.922340] usb 2-1.4: Product: My Passport 259D
[12957.922345] usb 2-1.4: Manufacturer: Western Digital
[12957.922349] usb 2-1.4: SerialNumber: 575831314134364854353953
[12958.013968] usb-storage 2-1.4:1.0: USB Mass Storage device detected
[12958.014112] scsi host6: usb-storage 2-1.4:1.0
[12958.014256] usbcore: registered new interface driver usb-storage
[12958.038309] usbcore: registered new interface driver uas
[12959.013019] scsi 6:0:0:0: Direct-Access WD My Passport 259D 1005 PQ: 0 ANSI: 6
[12959.014112] scsi 6:0:0:1: Enclosure WD SES Device 1005 PQ: 0 ANSI: 6
[12959.019253] sd 6:0:0:0: Attached scsi generic sg2 type 0
[12959.019883] scsi 6:0:0:1: Attached scsi generic sg3 type 13
[12959.022984] sd 6:0:0:0: [sdb] Spinning up disk...
[12959.063784] scsi 6:0:0:1: Wrong diagnostic page; asked for 1 got 0
[12959.063793] scsi 6:0:0:1: Failed to get diagnostic page 0xffffffea
[12959.063797] scsi 6:0:0:1: Failed to bind enclosure -19
[12959.063829] ses 6:0:0:1: Attached Enclosure device
[12960.026951] .....ready
[12964.055981] sd 6:0:0:0: [sdb] 3906963456 512-byte logical blocks: (2.00 TB/1.82 TiB)
[12964.057461] sd 6:0:0:0: [sdb] Write Protect is off
[12964.057469] sd 6:0:0:0: [sdb] Mode Sense: 53 00 10 08
[12964.058794] sd 6:0:0:0: [sdb] No Caching mode page found
[12964.058806] sd 6:0:0:0: [sdb] Assuming drive cache: write through
[12964.245771] Alternate GPT is invalid, using primary GPT.
[12964.245818] sdb: sdb1
[12964.252442] sd 6:0:0:0: [sdb] Attached SCSI disk