Data Lifeguard Diagnostic is described as 'This is a Windows version of the Data LifeGuard Diagnostics. It will test WD internal and external drives. In additional, it can provide you with the model and serial of WD drives attached to the system' and is an app in the System & Hardware category. There are more than 25 alternatives to Data Lifeguard Diagnostic for a variety of platforms, including Mac, Windows, Linux, BSD and PortableApps.com. The best alternative is CrystalDiskInfo, which is both free and Open Source. Other great apps like Data Lifeguard Diagnostic are GSmartControl (Free, Open Source), HD Tune (Freemium), Victoria (Free) and Stats (Free, Open Source).
Pc-Check will scan for errors in all hardware components on the computer it is being deployed on and display diagnostic results. The software is bootable from CDs and USBs, so even if the OS won't start the program will still be able to run.
Beaconly is a flexible, easy to use data aggregating menu app that ties relevant information to you, beautifully one click-away in your macOs menu bar. Easily discover status of AWS, your Jira Tickets, and so much more.
Diskscan is intended to provide the information needed to decide if a disk is good or not, be it an HDD or an SSD it is likely to be holding important data and if you have a suspicion that it is failing it is also important to know how bad is it down the road.