new Libra 2 slow transfer rate

[KaizaCorp]

I just picked up a Libra 2, and I've noticed the transfer rate is quite slow (2.7-3.0 MB/s). My old Clara HD transfers much faster, and that's only on a USB2 port!

I've tried different cords, different ports, then tested those cords and ports with other devices (my phone), and done a factory reset... yet the transfer with the Libra 2 stays the same slow rate.

I will note that I was unable to perform a Manual Factory Reset (holding power + page turn for 30 seconds).

Are there any other steps I can take? Or do I have a dud?

[DNSB]

Try typing devmodeon in the search box. It won't find anything but if you then go into Settings => Device information, you should see a Developer options item. Opening that, you should find a Factory reset as the last entry. This is the equivalent to a manual factory reset.

[KaizaCorp]

Originally Posted by DNSB

Try typing devmodeon in the search box. It won't find anything but if you then go into Settings => Device information, you should see a Developer options item. Opening that, you should find a Factory reset as the last entry. This is the equivalent to a manual factory reset.

Thanks, I was able to reset it that way!

Unfortunately the transfer rate remains slow.

[KaizaCorp]

It occurs to me that perhaps this is just the maximum transfer rate for a Libre 2? Doesn't quite make sense to have it as such with a USB C port, but maybe it's due to the write speed of the harddrive?

Can anyone with a Libre 2 confirm they're able to get a faster transfer rate?

[JSWolf]

Originally Posted by KaizaCorp

It occurs to me that perhaps this is just the maximum transfer rate for a Libre 2? Doesn't quite make sense to have it as such with a USB C port, but maybe it's due to the write speed of the harddrive?

Can anyone with a Libre 2 confirm they're able to get a faster transfer rate?

I have no idea the transfer speed. I just send eBook(s) to my Libra 2 and it gets done.

[KaizaCorp]

Originally Posted by JSWolf

I have no idea the transfer speed. I just send eBook(s) to my Libra 2 and it gets done.

Mine got done... eventually. ~30 minutes to transfer a few hundred eBooks. Mainly an issue for the initial setup, but does disuade me from loading audiobooks.

[JSWolf]

Originally Posted by KaizaCorp

Mine got done... eventually. ~30 minutes to transfer a few hundred eBooks. Mainly an issue for the initial setup, but does disuade me from loading audiobooks.

Have you tried a different USB port be is USB 3 or USB-C? Have you tried a different cable? Have you tried a different computer?

[John F]

Originally Posted by JSWolf

Have you tried a different USB port be is USB 3 or USB-C? Have you tried a different cable? Have you tried a different computer?

Could you try transferring and report back your speed. Probably a good idead to get a baseline before blaming it on cables, ports, ...?

[305869]

I have 2.7mb/s transfer speed on my Kobo Libra 2. It's pretty slow but I just assumed that was normal. It's fast enough for most books, it's only comics that it's a problem or when transferring a lot of books at once.

[jackie_w]

This is a speed graph from a test drag-dropping 1100+ epubs to my Libra2 using Win11 via USB3.

As you can see, the speed slows down part-way through then speeds up a bit near the end. Still pretty slow compared to copying to my USB-connected external hard drive, which is about 70MB/s.

[KaizaCorp]

Originally Posted by John F

Could you try transferring and report back your speed. Probably a good idead to get a baseline before blaming it on cables, ports, ...?

Yes, I've tried it with multiple cables (the one that came with it and my own) and ports (USB2, USB3, and USB C). I get the same transfer rate (~2.7-3.0 MB/s) with the Libre 2 regardless. I get several times the transfer rate using the same ports with my Clara HD, so it seems odd the device with USB C would be slower.

Originally Posted by JSWolf

Have you tried a different USB port be is USB 3 or USB-C? Have you tried a different cable? Have you tried a different computer?

Yes, same situation. I've not tried on another computer though (but I have tested the cords with other devices).

Edit: Tried on another computer (Windows 10, USB2 port) and got the same transfer rate.

[KaizaCorp]

Originally Posted by 305869

I have 2.7mb/s transfer speed on my Kobo Libra 2. It's pretty slow but I just assumed that was normal. It's fast enough for most books, it's only comics that it's a problem or when transferring a lot of books at once.

Originally Posted by jackie_w

This is a speed graph from a test drag-dropping 1100+ epubs to my Libra2 using Win11 via USB3.

As you can see, the speed slows down part-way through then speeds up a bit near the end. Still pretty slow compared to copying to my USB-connected external hard drive, which is about 70MB/s.

Thank you for testing that out for me. It seems like that may just be the rate it goes for the Libre 2 (unless we all have the same issue!)

Edit: I did some tests with CrystalDiskMark on both the Clara HD and Libre 2 .

The write speeds for the last two rows are closer to what I get transferring many epubs. Although 2.7-3.0 MB/s is still the maximum I can get even if it's one large file (like a KoboRoot.tgz).

[JSWolf]

This is copying about 1GB worth of random eBooks to my Libra 2 from SSD to the Libra 2 via USB-C to USB-C in Windows 11 using Windows Explorer. I'm getting about 3M to about 6MB.

[Aleron Ives]

There is no way the memory inside an e-reader is fast enough to take advantage of USB 3 transfer speeds. If the transfer is fast at first and then slows down, it's probably because the computer was transferring books into a buffer, and once the buffer filled up, it had to slow down to wait for the buffer to empty at the real transfer rate.

[JSWolf]

250 random eBooks copied to my Libra 2 same way as the previous message took an average of 4.31MB to copy.

1,245,760,356 bytes took 4:35.29 to copy.