Sandisk Ixpand, Google Photos, ICloud ??

This is my worry whenever I need to back up my photos. I don't know where should I put them. Most of cloud based back up has a payment now..not unlike before. I am in need of your help.

Before, I've been using Google Photos but 15gb nalang pedeng maback up then may pay na.

Sa Apple ICloud naman mahal ang monthly.

Sandisk Ixpand, I've been thinking about trying this one... but need more information about this.

Where are you guys, back up your photos? Do you have any recommendations? If so, I would really appreciate those comments.

Reason I am asking this because, I want to be more wise when it comes to my money. Parang Cost efficient ba? Kasi dati naman walang bayad yung mga back up ng photos..