SanDisk MobileMate USB 3.0 microSD Card Reader is the smallest microSD Card Reader for USB-A ports that I have came across.

SanDisk MobileMate USB 3.0 microSD Card Reader - Packaging Front
SanDisk MobileMate USB 3.0 microSD Card Reader – Packaging Front
SanDisk MobileMate USB 3.0 microSD Card Reader - Packaging Back
SanDisk MobileMate USB 3.0 microSD Card Reader – Packaging Back
SanDisk MobileMate USB 3.0 microSD Card Reader - Packaging
SanDisk MobileMate USB 3.0 microSD Card Reader – Packaging

It measures 31 x 21 x 9 mm and weighs just 3.4g.

SanDisk MobileMate USB 3.0 microSD Card Reader - Top
SanDisk MobileMate USB 3.0 microSD Card Reader – Top

I bought mine from Amazon.sg for S$12.88. The same reseller, 12buy.sg, is also selling on Shopee for S$13.28.

SanDisk MobileMate USB 3.0 microSD Card Reader - USB-A End
SanDisk MobileMate USB 3.0 microSD Card Reader – USB-A End
SanDisk MobileMate USB 3.0 microSD Card Reader - microSD End
SanDisk MobileMate USB 3.0 microSD Card Reader – microSD End

Tesla cars come with 128GB Flash Drive, which may not be enough for you.

I read about flash drives and SSDs being unable to handle the frequent, continuous writes from the cameras, and the Tesla community recommend getting a microSD card reader with a high-endurance microSD card.

So I got the 512GB SanDisk High Endurance microSD with the SanDisk MobileMate USB 3.0 microSD Card Reader to replace the 128GB Tesla Flash Drive.

SanDisk MobileMate USB 3.0 microSD Card Reader - With microSD Card
SanDisk MobileMate USB 3.0 microSD Card Reader – With microSD Card

Since it is so tiny and plugs directly into the USB-A port of the glovebox, it doesn’t move or take up space.

SanDisk MobileMate USB 3.0 microSD Card Reader - With microSD Card - Thumb
SanDisk MobileMate USB 3.0 microSD Card Reader – With microSD Card – Thumb
SanDisk MobileMate USB 3.0 microSD Card Reader
SanDisk MobileMate USB 3.0 microSD Card Reader