It's made by someone else 😀 The floppy drive is actually a YE Data Flashbuster PCMCIA floppy drive.

It looks like you've already found the Sony FA-P1, usually available much cheaper than the Toshiba branded one. The only difference being a longer cable. Both are OEM versions of the YE data drive.

I just checked the Sony FA-P1 with my Libretto 70CT and it booted from that without any trouble.

Thank you Thermalwrong for confirming this. Much appreciated 😀

Yes, the Sony PCMCIA floppy drives work with the Libretto without drivers, the BIOS can boot from a PCMICA disk drive.
HP and Compaq also work. There's a special key sequence also to update the BIOS from the floppy drive.
HOLD F12+POWER ON starts the BIOS update procedure.
http://www.minuszerodegrees.net/manuals/Toshi … oshiba_bios.htm

The Floppy drive was only really required for updating the BIOS and MBR. But if you like the sounds
and 30kB/s data transfer then that's great 😀

And here are Win2k, 98, 95 and DOS drivers for this floppy.

Bondi wrote on 2020-08-25, 19:58:

And here are Win2k, 98, 95 and DOS drivers for this floppy.

Hi, would these drivers you shared work with the Sony FA-P1 floppy drive?

rbarquer@yahoo.com wrote on 2023-09-15, 13:18:

Bondi wrote on 2020-08-25, 19:58:

And here are Win2k, 98, 95 and DOS drivers for this floppy.

Hi, would these drivers you shared work with the Sony FA-P1 floppy drive?

Of course!
The only thing is that in DOS it doesn't work on all laptops. But it's a problem of the driver, not the drive.

Hey guys! did anybody try to update the bios from 1.44MB floppies? i saw in some update readme file that it required 720k....which are kind of hard to get these days

bdp007ro wrote on 2025-09-01, 20:12:

Hey guys! did anybody try to update the bios from 1.44MB floppies? i saw in some update readme file that it required 720k....which are kind of hard to get these days

I've tried on slightly older models like the T4850CT and it just would not actually work until I used a 720k disk, it'd just sit there forever after loading the bios update screen if I used a 1.44mb disk.

Thermalwrong wrote on 2025-09-02, 12:31:

bdp007ro wrote on 2025-09-01, 20:12:

Hey guys! did anybody try to update the bios from 1.44MB floppies? i saw in some update readme file that it required 720k....which are kind of hard to get these days

I've tried on slightly older models like the T4850CT and it just would not actually work until I used a 720k disk, it'd just sit there forever after loading the bios update screen if I used a 1.44mb disk.

Was it a genuine 720k or did you modify a 1.44 one?

bdp007ro wrote on 2025-09-03, 18:42:

Thermalwrong wrote on 2025-09-02, 12:31:

bdp007ro wrote on 2025-09-01, 20:12:

Hey guys! did anybody try to update the bios from 1.44MB floppies? i saw in some update readme file that it required 720k....which are kind of hard to get these days

I've tried on slightly older models like the T4850CT and it just would not actually work until I used a 720k disk, it'd just sit there forever after loading the bios update screen if I used a 1.44mb disk.

Was it a genuine 720k or did you modify a 1.44 one?

Does it make a difference if you use a modified 1.44?
What's being described here is exactly what I'm seeing. I start the libretto up with the pcmcia attached pressing f12. I see the upgrade bios message, I insert the 720kb disk with the two files on it, I press any key, the drive makes a second of noise, then it just sounds like it's spinning. Nothing happens on the libretto, apart from a single beep.
I am using the 50ct bios files as I can't find the 70ct files yet, but I'd expect the screen to change from the initial update bios message

bionicsa wrote on 2026-01-17, 18:42:

Does it make a difference if you use a modified 1.44? What's being described here is exactly what I'm seeing. I start the libret […]
Show full quote

bdp007ro wrote on 2025-09-03, 18:42:

Thermalwrong wrote on 2025-09-02, 12:31:

I've tried on slightly older models like the T4850CT and it just would not actually work until I used a 720k disk, it'd just sit there forever after loading the bios update screen if I used a 1.44mb disk.

Was it a genuine 720k or did you modify a 1.44 one?

Does it make a difference if you use a modified 1.44?
What's being described here is exactly what I'm seeing. I start the libretto up with the pcmcia attached pressing f12. I see the upgrade bios message, I insert the 720kb disk with the two files on it, I press any key, the drive makes a second of noise, then it just sounds like it's spinning. Nothing happens on the libretto, apart from a single beep.
I am using the 50ct bios files as I can't find the 70ct files yet, but I'd expect the screen to change from the initial update bios message

It does absolutely have to be a proper 720KB disk, the procedure just fails silently if you try to use 1.44mb disks and I wouldn't trust a 720KB formatted 1.44mb disk for a BIOS update.
Trying to put a 50CT BIOS onto the 70CT will fail, they are very different machines and there are some identifiers that the BIOS updater / F12 BIOS will check before proceeding to overwrite the BIOS.

Thermalwrong wrote on 2026-01-20, 03:47:

bionicsa wrote on 2026-01-17, 18:42:

Does it make a difference if you use a modified 1.44? What's being described here is exactly what I'm seeing. I start the libret […]
Show full quote

bdp007ro wrote on 2025-09-03, 18:42:

Was it a genuine 720k or did you modify a 1.44 one?

Does it make a difference if you use a modified 1.44?
What's being described here is exactly what I'm seeing. I start the libretto up with the pcmcia attached pressing f12. I see the upgrade bios message, I insert the 720kb disk with the two files on it, I press any key, the drive makes a second of noise, then it just sounds like it's spinning. Nothing happens on the libretto, apart from a single beep.
I am using the 50ct bios files as I can't find the 70ct files yet, but I'd expect the screen to change from the initial update bios message

It does absolutely have to be a proper 720KB disk, the procedure just fails silently if you try to use 1.44mb disks and I wouldn't trust a 720KB formatted 1.44mb disk for a BIOS update.
Trying to put a 50CT BIOS onto the 70CT will fail, they are very different machines and there are some identifiers that the BIOS updater / F12 BIOS will check before proceeding to overwrite the BIOS.

Thanks for the reply.
I'm assured by the seller that it's a genuine 720k floppy. I did use the proper 70CT Bios files, but it still just went to black screen and the floppy drive whirred, short video of what happened here https://youtu.be/xscnxCB8XYE