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.
- Interface: SPI
- Micro SD Card Slot: 1
- SPI Flash Memory: 2MB
- Circuit Operating Voltage: 3.3V
- Compatibility: MKR