Changing Fast Recovery Area destination

My database is running in archive log mode, but flashback is disabled because I do not need it. The FRA is set to /flasharch mount point. Now, I am going to change the FRA location to /flasharch01 mount point due to space limitation. What to do with archivelog in the old location. Do I need to move the old files to new location? Could you guys please guide me step by step? RMAN uses control file instead of recovery catalog. Should I create a recovery catalog? if yes.. please how? I need steps please. As, I can't increase the FRA location. The only way to change the location is the solution. Could you please share the steps how to move the old files and how to catalog them? RMAN using control file instead of recovery catalog.