Kobo devices with internal SD card

[abij]

Hello,

I chanced upon a sale of Sandisk micro SD cards today. Then I was thinking on this forum whether there is a compiled list of Kobo devices with internal micro SD card slots. Considering the performance of a micro SD card has improved over the years, if we swap the internal SD card, replace it with a UHS-II card, will it make Kobo fly? I am not sure whether it is the CPU or SD card bus speed that chokes the overall performance.

What do you guys think?

Thanks.

[Barbara1955]

You can BUT YOU need to know how to get the Operation System on the new card.

[DNSB]

Originally Posted by abij

Hello,

I chanced upon a sale of Sandisk micro SD cards today. Then I was thinking on this forum whether there is a compiled list of Kobo devices with internal micro SD card slots. Considering the performance of a micro SD card has improved over the years, if we swap the internal SD card, replace it with a UHS-II card, will it make Kobo fly? I am not sure whether it is the CPU or SD card bus speed that chokes the overall performance.

What do you guys think?

Thanks.

What I've found over the years is the most critical spec for use in a Kobo ereader is the 4K small block read/write speeds (currently I use Crystal DiskMark 6 and pay special attention to the 4KiB Q1T1 read/write speeds). There is no guarantee that a high speed SD card will have decent specifications for those small block tests since they are often optimized for large block (video, images) sequential read/writes.

There was a thread in the XDA forums about speed testing (find it at A Closer Look At MicroSD and Reader Speed and one oriented to the Raspberry Pi at microSD Card Benchmarks.