If you play Ragnarok Mobile this thing already exists that's why Ragnarok Mobile is game without problem bag :), i hope developer see this , this a good idea, the most safest transfering item imo is by guild,friend, or dual device, but still it's kinda hard too... Good video, i like it..
You should have said you get only 10 free slots in the start and to open more you need to buy specific bags with mcoins and now thay have reason to add it as soon is possible
To be honest this is a very simple idea that everyone have played the game for other a year most had think about it and it will be kinda sad if aigrind see it now and add it to the game after 12 years game is up but your explanation and details in video deserve thay will listen to you