Keysight Technologies N5224A Service Manual page 316

Repair and Replacement Procedures
Removing and Replacing the A55 Solid State Drive (SSD)
Figure 7-22 SSD Removal
Reinstalling the SSD
Reverse the order of the removal procedure.
Install Backup Files onto the New SSD
The files that were previously saved onto a USB flash memory drive must now
be installed onto the new SSD. The network analyzer must be powered up and
operating.
7-50 Keysight N5224A/25A Service Guide