Where are the backed up files stored when I use `local` storage?

FAQ
1

Note:

If no Network File System (NFS) is mounted to a BR or TiKV node, or if you use external storage that supports Amazon S3, GCS, or Azure Blob Storage protocols, the data backed up by BR is generated at each TiKV node.Note that this is not the recommended way to deploy BR, because the backup data are scattered in the local file system of each node. Collecting the backup data might result in data redundancy and operation and maintenance problems. Meanwhile, if you restore data directly before collecting the backup data, you will encounter the SST file not found error.

When you use local storage, backupmeta is generated on the node where BR is running, and backup files are generated on the Leader nodes of each Region.