The Arduino MKR MEM shield will allow you to add more flash memory and storage. It provides 2-megabytes of flash memory. It also includes a slot for adding a microSD card to store several gigabytes of storage. This can allow you to store data for later analysis.
|Micro SD Card Slot||1|
|Micro SD Card||Not Included|
|SPI Flash Memory||2 MB|
|Circuit Operating Voltage||3.3 V|