The Ultimate Mobile Bag Turned Out to be an 'A4 Vertical'—The Fine Line Between Weight and Storage

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I have always carried my MacBook Air and its peripherals around, but when I packed everything into my main bag (a backpack), the total weight exceeded 6kg, which was starting to interfere with my daily life...
So, it suddenly occurred to me, 'Do I really need all of this every single day?' I decided to separate my gear and try using a mobile bag.

The items to be separated are this 13-inch MacBook Air and its peripherals.

The first thing I tried was a Manhattan Portage messenger bag. It's excellent on its own, but it has such a strong presence that it's too heavy to be a 'sub-bag'...

I wanted something more mobile-friendly, a bag I could carry around casually.
Something that doesn't look too much like a 'main bag,' but isn't 'unreliable' either—that perfect, elusive balance.
The one that answered such an unreasonable demand was—

Rootote A4 Vertical Tote Bag

A simple design.
Minimal storage.
A modest sub-pocket.
A gusset that isn't too wide.
And the biggest point is that it's an A4 vertical shape.

It fits a laptop and peripherals perfectly, and this bag—
It can actually be placed directly inside my main backpack.
That wouldn't be possible with a horizontal bag.

If you're looking for usability as a 'bag-in-bag,' a thinner nylon fabric might be fine, but this one works perfectly as a standalone sub-bag as well. Its texture and price point are just right for that purpose.

With this, I can lighten my main bag for daily use while still being able to take just my mobile gear when needed.
I've found an excellent solution that handles the switch between sub and main operation in one go.
I highly recommend it.

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