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tmutil status

Backup session status:
{
    ClientID = "com.apple.backupd";
    Running = 0;
}

sudo tmutil addexclusion -p /Users/admin/Documents
sudo tmutil addexclusion -p /Users/admin/Downloads
sudo tmutil addexclusion -p /Users/admin/Pictures
sudo tmutil addexclusion -p /Users/admin/Movies
defaults read /Library/Preferences/com.apple.TimeMachine.plist SkipPaths

(
    "/Users/admin/Downloads",
    "/Users/admin/Movies",
    "/Users/admin/Pictures",
    "/Users/admin/Documents"
)

tmutil startbackup
tmutil status

Backup session status:
{
    BackupPhase = Copying;
    ClientID = "com.apple.backupd";
    DateOfStateChange = "2021-12-20 08:49:29 +0000";
    DestinationID = "7E30AFBF-F018-41F2-891B-6BF963BEB826";
    DestinationMountPoint = "/Volumes/External HD";
    FirstBackup = 1;
    Progress =     {
        Percent = 0;
        "_raw_Percent" = 0;
        "_raw_totalBytes" = 177288978432;
        bytes = 0;
        files = 0;
        totalBytes = 177288978432;
        totalFiles = 30561;
    };
    Running = 1;
    Stopping = 0;
}

tmutil destinationinfo
cd "/Volumes/External HD"
ls -lh

total 8
drwxr-xr-x@ 6 root  wheel   192B Dec 20 11:49 2021-12-20-115045.previous
-rw-r--r--@ 1 root  wheel   602B Dec 20 11:50 backup_manifest.plist

sudo tmutil removedestination "7E30AFBF-F018-41F2-891B-6BF963BEB826"