There are 7 GDPR principles:
1️⃣ Lawfulness, fairness, and transparency
2️⃣ Integrity and confidentiality
3️⃣ Purpose limitation
4️⃣ Accuracy
5️⃣ Data minimization
6️⃣ Storage limitation
7️⃣ Accountability
You can read more about each of the 7 principles here!
