user@user-Mac-Pro ~ % sudo dfu-util -U backup.dfu
Password:
dfu-util 0.9
Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2016 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to
http://sourceforge.net/p/dfu-util/tickets/
Opening DFU capable USB device...
ID 05ac:f007
Run-time device DFU version 0110
Claiming USB DFU Interface...
Setting Alternate Setting #0 ...
Determining device status: state = dfuERROR, status = 12
dfuERROR, clearing status
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 0110
Device returned transfer size 64
Copying data from DFU device to PC
Upload [ ] 0% 0 bytesdfu-util: Error during upload
Failed.
user@user-Mac-Pro ~ % sudo dfu-util -U backup.dfu
dfu-util 0.9
Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2016 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to
http://sourceforge.net/p/dfu-util/tickets/
Opening DFU capable USB device...
ID 05ac:f007
Run-time device DFU version 0110
Claiming USB DFU Interface...
Setting Alternate Setting #0 ...
Determining device status: state = dfuERROR, status = 15
dfuERROR, clearing status
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 0110
Device returned transfer size 64
dfu-util: Cannot open file backup.dfu for writing: File exists
user@user-Mac-Pro ~ %