Keysight x-series User Reference Manual page 313

6 System Functions
System
If the serial number information in the backup file being restored is different from that of the instrument, the
following message appears (the serial number shown are examples):
he default restore location will be first drive identified as an external drive (USB or LAN) if such is available;
if not, the internal D: partition will be selected. The default restore file will be the most recent file that
matches the default backup file name format: AlignDataBackup_<model number>_<serial number>_
<date>.bak
Changing the drive letter also modifies the path displayed in the box below. When this step is first loaded,
the drive drop-down menu is populated with connected drives, which provide you with read access. The
path defaults to the AlignBackups folder. The most recent *.bak file in the folder will also be selected by
default.
EMI Receiver Mode Reference 313