IMO a confident, expert therapist doesn't need previous records. They will be able to - and want to - make their own diagnosis etc. There's a reason for people to change psychologists, counselors etc...and while that might be evident by the new T reading the records and finding how the former T wrote and thought, it's a waste of time. IMO.
Often a phone call with the former T is plenty, if the patient allows, but not necessary imnshpo.

Unless it's a necessary transfer of patient because of health etc, and if there is a long history that would aid the patient to not have to cover all that info again, the new T will be able to get up to running speed rather quickly.

But those are just my POVs.