To change the safe where recordings are kept for a specific platform, which setting must...

 To change the safe where recordings are kept for a specific platform, you must update the SessionRecorderSafe setting in the platform configuration. This setting specifies the name of the safe where the Privileged Session Manager (PSM) recordings will be stored. After updating the SessionRecorderSafe setting, you need to restart the PSM service or wait for the new settings to be applied, which typically takes about 10 minutes. Once the new settings are in effect, any new PSM sessions initiated will have their recordings stored in the newly specified safe1.

References:

CyberArk Docs - How to Create/Change/Configure PSM Recording Safes