diff --git a/src/sandbox.c b/src/sandbox.c
index 9774ebf..f5c3016 100644
--- a/src/sandbox.c
+++ b/src/sandbox.c
@@ -35,10 +35,12 @@ Command COMMANDS[] = {
 	{CommandTrimDisk, "trim-disk", "<entry id>", "Trims the disk of an entry.",
 	 "TODO: Add details."},
 	{},
-	{CommandAddBacking, "add-backing", "<backing id> <entry id>", "Adds a new backing to the sandbox.",
+	{CommandAddBacking, "add-backing", "<entry id> <description>", "Adds a new backing to the sandbox.",
 	 "TODO: Add details."},
 	{CommandRemoveBacking, "remove-backing", "<backing id>", "Removes a backing from the sandbox.",
 	 "TODO: Add details."},
+	{CommandListBackings, "list-backings", NULL, "Lists all the backings in the sandbox.",
+	 "TODO: Add details."},
 };
 
 int main(int argc, char* argv[]) {
@@ -242,9 +244,9 @@ int CommandListEntries(int argc, char* argv[]) {
 			if (status != SUCCESS)
 				continue;
 
-			fprintf(stdout, "%zu | %-*s | %-10s | %s%s\n", i, (int)max_length, entries[i], size_fmt, info.backing_identifier == NULL ? "No backing" : "Backed by ", info.backing_identifier == NULL ? "" : info.backing_identifier);
+			fprintf(stdout, "%-*s | %-10s | %s%s\n", (int)max_length, entries[i], size_fmt, info.backing_identifier == NULL ? "No backing" : "Backed by ", info.backing_identifier == NULL ? "" : info.backing_identifier);
 		} else
-			fprintf(stdout, "%zu | %-*s | %s\n", i, (int)max_length, entries[i], "No disk ");
+			fprintf(stdout, "%-*s | %s\n", (int)max_length, entries[i], "No disk ");
 	}
 
 	// Free the entries
@@ -541,8 +543,25 @@ int CommandAddBacking(int argc, char* argv[]) {
 	}
 
 	// Extract the backing identifier and entry identifier
-	const char* backing_id = argv[0];
-	const char* entry_id = argv[1];
+	const char* entry_id = argv[0];
+	const char* backing_description = argv[1];
+
+	// Generate the backing id by incrementing the latest backing index
+	char* latest_backing;
+	Status status = GetLatestBacking(&latest_backing);
+	if (status != SUCCESS)
+		return EXIT_FAILURE;
+
+	int backing_index = 0;
+	if (latest_backing != NULL) {
+		backing_index = GetBackingIndex(latest_backing) + 1;
+		free(latest_backing);
+	}
+
+	char* backing_id;
+	status = Format(&backing_id, "%d - %s", backing_index, backing_description);
+	if (status != SUCCESS)
+		return EXIT_FAILURE;
 
 	// Add the backing
 	Status status = AddBacking(backing_id, entry_id);
@@ -573,3 +592,27 @@ int CommandRemoveBacking(int argc, char* argv[]) {
 	Log(LOG_LEVEL_INFO, "Successfully removed backing '%s'.", backing_id);
 	return EXIT_SUCCESS;
 }
+
+int CommandListBackings(int argc, char* argv[]) {
+	if (argc > 0) {
+		Log(LOG_LEVEL_ERROR, "Too many arguments supplied to command 'list-backings'.");
+		return EXIT_FAILURE;
+	}
+
+	// List the backings
+	char** backings = NULL;
+	Status status = ListBackings(&backings);
+	if (status != SUCCESS)
+		return EXIT_FAILURE;
+
+	// Print the backings
+	for (size_t i = 0; backings[i] != NULL; i++)
+		fprintf(stdout, "%s\n", backings[i]);
+
+	// Free the backings
+	for (size_t i = 0; backings[i] != NULL; i++)
+		free(backings[i]);
+	free(backings);
+
+	return EXIT_SUCCESS;
+}
diff --git a/src/sandbox.h b/src/sandbox.h
index e875ca0..a81831a 100644
--- a/src/sandbox.h
+++ b/src/sandbox.h
@@ -29,3 +29,4 @@ int CommandTrimDisk(int argc, char* argv[]);
 
 int CommandAddBacking(int argc, char* argv[]);
 int CommandRemoveBacking(int argc, char* argv[]);
+int CommandListBackings(int argc, char* argv[]);