We don’t recommend less than 32GB of storage memory. Though some tablets can be purchase with only 16GB, and this is sufficient for StreetWise, the amount of memory left over after accounting for the device operating system is actually relatively limited.
The main consideration is the storage of cached preplans. StreetWise has a feature allowing you to selectively cache preplan data to the device storage memory so that it can be viewed even if your cellular or Wi-Fi broadband connectivity is lost due to poor reception. This makes these preplans available off-line. The amount of preplan data that can be cached to the device is limited by the storage capacity of the device, which is why StreetWise allows you to select which specific preplans are cached. So, if this feature is important to you, you’ll want to lean towards greater storage memory. If connectivity is not typically a problem, or if you have very few preplans you’ll want to cache, then capacity of 16 to 32GB should be plenty.