Add quotes in case path has spaces, which it shouldn't, but it's good practice to protect it anyways.

files/dwm/dwm.sh

@@ -35,9 +35,9 @@ xsetroot -solid "$purple"
 #exec slstatus &
 
 # Custom #
-source `which volume.function`
-source `which battery.function`
-source `which storage.function`
+source "`which volume.function`"
+source "`which battery.function`"
+source "`which storage.function`"
 if [[ "`storage-root`" == "`storage-home`" ]]; then
 	storage_cmd=echo 'Storage: `storage-root-dwm`)"'
 else