What is the cheapest way for storage?

The cheapest way for storage depends on type, but generally minimizing need and using what you already own is cheapest. For physical items, cheapest is decluttering and storing in your own home using closets, garage, attic, and under bed containers rather than renting unit. If you must rent, compare facilities, choose smallest non climate controlled unit in less central location, and look for first month free promotions and long term discounts. Sharing unit with friend splits cost. Using uniform boxes and shelving maximizes space, reducing size needed. For moving, portable containers may be cheaper than full service. For digital storage, cheapest is using free tiers of Google Drive 15 GB, OneDrive 5 GB, and external hard drives you already own. Buying external hard drive of 2 to 5 TB for one time cost of 70 to 120 dollars is cheaper long term than monthly cloud fees for large data. For photos, compressing and using free Google Photos within limits saves money. Avoid paying for features you do not need, regularly audit stored items, and set reminder to cancel when no longer needed.