How to save my old one drive data onto a sd card? Data gets deleted tomorrow

My onedrive pictures from 2015 to july 2016, have crossed the limit of 5 gb, it's been a long time since it has been frozen,i didn;t care but now i just signed in and realized they'll delete my data tomorrow, so instead of deleted my pictures and making it below 5gb, i want to move the one cloud old data to my Sd card of 16 gb conviniently, HELP QUICK BECAUSE MY DATA DELETES TOMORROW it's valuable, i have a mac and a lumia 950 along with an 16gb sd card. tell me what to do. any help will be appreciated

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