The default location for the files when using MinKNOW standalone for MinION Mk1B or PromethION 2 Solo is

Windows: C:\data\

Mac: /Library/MinKNOW/data

Ubuntu: /var/lib/MinKNOW/data/

On our integrated compute devices (e.g. MinION Mk1C, GridION, PromethION 24/48, P2 Integrated), the default location is:

/data

To find more details about the folder structure please view the installing MinKNOW section of the MinKNOW protocol.