[{"_id":ObjectId("63b9cbae9ba8854050de6f72"),"mail":"user@gmail.com","password":"user1234","folders":[{"folderName":"Main0","files":[{"fileName":"userfile3","fileType":"usertype3","date":"Sat Jan 07 2023 23:14:46 GMT+0330 (Iran Standard Time)","filePath":"userpath3","_id":ObjectId("63b9cbae9ba8854050de6f74")}],"_id":ObjectId("63b9cbae9ba8854050de6f73")},{"folderName":"Main1","files":[{"fileName":"file222","fileType":".png","date":"13-02-2022 21:15","filePath":"/uploads","_id":ObjectId("63b9d4e5c37f4685ce008ef2")}],"_id":ObjectId("63b9d4e5c37f4685ce008ef1")},{"folderName":"Main2","files":[{"fileName":"file222","fileType":".png","date":"13-02-2022 21:15","filePath":"/uploads","_id":ObjectId("63b9d5df44190cdeaae19efb")}],"_id":ObjectId("63b9d5df44190cdeaae19efa")}],"__v":0}]

db.collection.update({mail:"user@gmail.com","folders.folderName":"Main1"},{$push:{"folders.$.files":{fileName:"file748",fileType:".jpg",date:"13-02-2022 21:15",filePath:"/uploadsssss",}}})