diff --git a/src/commands/group/__test__/group.test.ts b/src/commands/group/__test__/group.test.ts
index 75ed40d5..14b95934 100644
--- a/src/commands/group/__test__/group.test.ts
+++ b/src/commands/group/__test__/group.test.ts
@@ -25,12 +25,15 @@ describe('groupItems', () => {
 
 describe('group', () => {
   const memoryFs = new FsMemory();
+
   before(() => {
     fsa.register('/tmp/group', memoryFs);
   });
+
   it('should load from a JSON array', async () => {
     await commandGroup.handler({ inputs: [JSON.stringify([1, 2, 3, 4])], forceOutput: true, size: 50 } as any);
-    assert.deepEqual(await fsa.readJson('/tmp/group/output.json'), [[1, 2, 3, 4]]);
+    assert.deepEqual(await fsa.readJson('/tmp/group/output.json'), ['000']);
+    assert.deepEqual(await fsa.readJson('/tmp/group/output/000.json'), [1, 2, 3, 4]);
   });
 
   it('should load from multiple JSON arrays', async () => {
@@ -39,21 +42,21 @@ describe('group', () => {
       forceOutput: true,
       size: 3,
     } as any);
-    assert.deepEqual(await fsa.readJson('/tmp/group/output.json'), [
-      [1, 2, 3],
-      [4, 'alpha'],
-    ]);
+
+    assert.deepEqual(await fsa.readJson('/tmp/group/output.json'), ['000', '001']);
+    assert.deepEqual(await fsa.readJson('/tmp/group/output/000.json'), [1, 2, 3]);
+    assert.deepEqual(await fsa.readJson('/tmp/group/output/001.json'), [4, 'alpha']);
   });
+
   it('should load from strings', async () => {
     await commandGroup.handler({
       inputs: ['s3://foo/bar', JSON.stringify([1, 2, 3, 4]), JSON.stringify(['alpha'])],
       forceOutput: true,
       size: 3,
     } as any);
-    assert.deepEqual(await fsa.readJson('/tmp/group/output.json'), [
-      ['s3://foo/bar', 1, 2],
-      [3, 4, 'alpha'],
-    ]);
+    assert.deepEqual(await fsa.readJson('/tmp/group/output.json'), ['000', '001']);
+    assert.deepEqual(await fsa.readJson('/tmp/group/output/000.json'), ['s3://foo/bar', 1, 2]);
+    assert.deepEqual(await fsa.readJson('/tmp/group/output/001.json'), [3, 4, 'alpha']);
   });
 
   it('should load from a file', async () => {
@@ -64,9 +67,8 @@ describe('group', () => {
       forceOutput: true,
       size: 3,
     } as any);
-    assert.deepEqual(await fsa.readJson('/tmp/group/output.json'), [
-      [1, 2, 3],
-      [4, 5],
-    ]);
+    assert.deepEqual(await fsa.readJson('/tmp/group/output.json'), ['000', '001']);
+    assert.deepEqual(await fsa.readJson('/tmp/group/output/000.json'), [1, 2, 3]);
+    assert.deepEqual(await fsa.readJson('/tmp/group/output/001.json'), [4, 5]);
   });
 });
diff --git a/src/commands/group/group.ts b/src/commands/group/group.ts
index 29b7296f..46370f08 100644
--- a/src/commands/group/group.ts
+++ b/src/commands/group/group.ts
@@ -73,7 +73,16 @@ export const commandGroup = command({
     const grouped = groupItems(inputs, args.size);
     logger.info({ files: inputs.length, groups: grouped.length }, 'Group:Done');
     if (args.forceOutput || isArgo()) {
-      await fsa.write('/tmp/group/output.json', JSON.stringify(grouped));
+      const items = [];
+      // Write out a file per group into /tmp/group/output/000.json
+      for (let i = 0; i < grouped.length; i++) {
+        const groupId = String(i).padStart(3, '0');
+        await fsa.write(`/tmp/group/output/${groupId}.json`, JSON.stringify(grouped[i], null, 2));
+        items.push(groupId);
+      }
+
+      // output.json contains ["001","002","003","004","005","006","007"...]
+      await fsa.write('/tmp/group/output.json', JSON.stringify(items));
     }
   },
 });