What about archived client details; how long do they stay in the Phorest Salon Software system?

Within the Phorest Salon Software, you can set a data retention period which defines how long you plan on keeping clients’ personal data. GDPR requires you to hold data for a certain amount of time, but also to delete it after a specific amount of time (depending on the type of data you’ve held). Please look up what those periods are. Also, check with your insurance company to know how long they require you to hold certain types of information. Since this is a legal obligation of yours as a salon, it will override a client’s right to be forgotten.