The WiFi Pineapple’s recon DB (recon.db) is volatile, because it is stored (by default) in the /tmp folder.
I store my recon.db on the SD card to make it persistent (survives a reboot).
First the SD card has to be formatted:
Then the “Scans Location” field can be changed from /tmp/ to /sd/:
recon.db is an SQLite database, that can be browsed with tools like sqlitebrowser: