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6 months agoTechnically, they could retain posts from users if they are irreversibly anonymized. However, ensuring with 100% certainty that none of your posts ever contained any personal data that could lead to the identification of you as an individual is challenging. The safest option is therefore to also delete your posts.
I’m unsure why he mentioned a good amount, as I am across several large spaces on the matrix using Synapse and have accumulated approximately 30GB of data in >1 year. I must clarify that I am the sole user of my instance.