Arduino MKR Mem Shield
Use this shield when you need more storage, it features a 2Mbyte Flash memory . If you need more space you can use a microSD.
Are you developing a complex IoT application with your MKR board and running out of memory? The new MKR men shield will give you the extra memory you need! With 2 extra MByte of memory you can drastically increase the complexity of your programs; nevertheless the built-in SD slot gives you the possibility to store data for later analysis.