Reset is for reinstalling the factory image. Everything is deleted and the OS is reinstalled. Data cannot be recovered. You should always back-up you data, especially before doing any type of refresh or reinstall.
XPS M1530, Win 10 CU Pro 32-bit Inspiron E1705, Win 10 CU Pro 32-bit Dimension 9100, Win 10 AU Pro 32 bit Inspiron 660, Win 10 CU 64 bit Inspiron 3668, Win 10 CU 64 bit Asus T100 Tablet, Windows 10 CU 32 bit