Part 1 of 2
Safe Boot does not delete any of your personal files or setting
Restart in Safe Mode.
This will automatically perform a Disk Repair, clear cache files and only load Apple Software, extensions and fonts.
The boot up will be slow and can take some time - Normal.
Safe Mode will also eliminate Third Party Software, extensions and drivers from loading.
It will only load the Minimum amount of Core Apple Processes to allow the the computer to function at a reduced Level of Performance
Part 2 of 2
So depending on the computer specific configurations
It is possible the machine has an ALL SSD drive or a Combo / SSD / Rotational ( Fusion ) drive
To help expedite matters and avoid a question / answer, question / answer etc.
Download the Application Etrecheck ( External Link ) directly from the Developer.
The Application is Not a " Silver Bullet " and is only a tool to examine the Hardware / Software used on this computer
This is a Diagnostic Tool that makes no changes to the computer Hardware / Software used on this computer
The application is free or paid from added features.
The Report will Not Reveal Any Personal Information.
Post back the Full Report - copy and paste - >>>> using the Additional Text Icon ( 3rd Icon to last ) <<<<