diff --git a/src/lib/handlers/sources/tar.sh b/src/lib/handlers/sources/tar.sh
index 6414fd0..46d100e 100644
--- a/src/lib/handlers/sources/tar.sh
+++ b/src/lib/handlers/sources/tar.sh
@@ -16,12 +16,12 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-handler::tar() {
+src_tar() {
     # Backup local files with tar(1). Handle 'file' URI scheme.
     #
-    # Usage: handler::tar URI
+    # Usage: src::tar URI
 
-    log "Run handler handler::tar()"
+    log "Run handler ${FUNCNAME[0]}()"
 
     local uri
     local src_path
@@ -36,6 +36,11 @@ handler::tar() {
 
     parse_uri "$uri"
 
+    # shellcheck disable=SC2154
+    if [[ "$scheme" != 'file' ]]; then
+        log -p "Error: Wrong URI scheme: $scheme" >&2; exit 1
+    fi
+
     # shellcheck disable=SC2154
     if [ -f "$path" ] || [ -d "$path" ]; then
         src_path="$path"
@@ -95,18 +100,22 @@ handler::tar() {
 
     archive="${dst_path}/$(gen_backup_name "$file_ext")"
 
-    [ "$__verbose" ] && {
-        echo "Source path: $src_path"
-        echo "Destination path: $dst_path"
-        echo "Run command: tar $exclude $tar_options $archive $src_path"
-    }
-
     log "Archiving $src_path to $archive ..."
-    log "Run command: tar $exclude $tar_options $archive $src_path"
 
     # Run tar
-    try tar "$exclude" "$tar_options" "$archive" "$src_path"
+    # NOTE! `exclude` and `tar_options` variables must be unquoted!
+    # shellcheck disable=SC2086
+    set -- tar $exclude $tar_options "$archive" "$src_path"
 
-    # Append path to 'backups' array
-    backups+=("$archive")
+    log "Run command: $*"
+
+    # shellcheck disable=SC2154
+    if "$@" 2>> "$__log_file"; then
+        # Append path to 'backups' array
+        backups+=("$archive")
+    else
+        remove_if_empty "$archive"
+        handle_error \
+            "Error: Something went wrong when executing command:\n\t$*"
+    fi
 }
diff --git a/src/lib/handlers/targets/cp.sh b/src/lib/handlers/targets/cp.sh
index 6e65902..26914d2 100644
--- a/src/lib/handlers/targets/cp.sh
+++ b/src/lib/handlers/targets/cp.sh
@@ -16,13 +16,13 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-handler::cp() {
+tgt_cp() {
     # Transfer files to another location from __main_target_path using cp(1)
     # Handle 'file' URI scheme.
     #
-    # Usage: handler::cp URI
+    # Usage: tgt_cp URI
 
-    log "Run handler handler::cp()"
+    log "Run handler ${FUNCNAME[0]}()"
 
     local uri
     local dst_path
@@ -32,30 +32,40 @@ handler::cp() {
     # shellcheck disable=SC2154
     if [[ "$uri" == "$__main_target" ]]; then
         : # Do nothing. Source and destination is the same
-        log "Nothing to do: Source and destination is the same: $__main_target"
-    else
-        # Copy backups to another destination
-        parse_uri "$uri"
-
-        # shellcheck disable=SC2154
-        if [ -f "$path" ] || [ -d "$path" ]; then
-            dst_path="$path"
-        else
-            echo "Error: Path '$path' from URI '$uri' does not exists" >&2
-            exit 1
-        fi
-
-        [ "$__verbose" ] && echo "Destination path: $dst_path"
-
-        # Copy files preserving metadata
-        # shellcheck disable=SC2154
-        for backup in "${backups[@]}"; do
-            log "Copying file $backup to $dst_path ..."
-            log "Run command: cp --archive $backup $dst_path"
-            if [ "$__verbose" ]; then
-                echo "Run command: cp --archive $backup $dst_path"
-            fi
-            try cp --archive "$backup" "$dst_path"
-        done
+        log "Nothing to do:"\
+            "Source and destination is the same: $__main_target"
+        return
     fi
+
+    # Copy backups to another destination
+    parse_uri "$uri"
+
+    # shellcheck disable=SC2154
+    if [[ "$scheme" != 'file' ]]; then
+        log -p "Error: Wrong URI scheme: $scheme" >&2; exit 1
+    fi
+
+    # shellcheck disable=SC2154
+    if [ -f "$path" ] || [ -d "$path" ]; then
+        dst_path="$path"
+    else
+        echo "Error: Path '$path' from URI '$uri' does not exists" >&2
+        exit 1
+    fi
+
+    # Copy files preserving metadata
+    # shellcheck disable=SC2154
+    for backup in "${backups[@]}"; do
+        log "Copying file $backup to $dst_path ..."
+        set -- cp --archive "$backup" "$dst_path"
+
+        log "Run command: $*"
+
+        if "$@" 2>> "$log"; then
+            : # Success
+        else
+            handle_error \
+                "Error: Something went wrong when executing command:\n\t$*"
+        fi
+    done
 }