A Sar, or D-sar is a Data Access Request. This is one of the rights, you, as European citizen, have gotten when the General Data Protection Regulation (GDPR) came into effect.
What if we would all request our data? For a company who is not so prepared to this, it may seem a horrible scenario, comparable to a D-DOS attack.
It may take weeks to comply!
But you will get your data, and you can also start to give those same companies access to a lot more data than ever before.