Microsoft Surface Duo

The internal data storage capacity defines how much space will be left for your files. If your phone's internal storage is less than 1GB , you will only get enough space for the most basic necessities and little else. You will be able to upload phone numbers and a few text messages or notes. A larger memory with a 16GB capacity is the least you need if you want your device to actually work as a smartphone. If you decide to buy a mobile phone with a 32 or 64GB capacity, you may not even need an extra memory card. 128GB or more gives you enough space to store a week worth of movies.