"Smart Save" feature instructions.

When the function was set to be yes:

The device will record a rough route, which will not be as detailed as that in the mode without Smart Save.

But it will have two advantages:

1.  It will help to extend the cruise time;
2.  The route size is not so big, so that it can be transferred to APP in a short time.

It is recommended to set the Smart Save to be yes, if the detailed route is not required.

Steps: System>Setting>other functions>Save Smart.

If you wants to set the device to record data every 1 second, you may try to set the "smart save "to no.

Related article: How Can I Set My iGS620 to Record Every 1 Seconds ?