@Wintermute_BBS https://www.msx.org/wiki/Category:Flash_Card_Interfaces has a nice overview of flash card interfaces for the #MSX you might find useful. :)
For its price and current availability, https://www.msx.org/news/hardware/en/msx-pico-cartridge has piqued my interest, though ideally I'd probably want a #GR8NET cart for its additional functionalities.
Category:Flash Card Interfaces - MSX Wiki

Flash card interfaces are extensions that allow a Compact Flash, MMC, or SD card to be used as a disk drive.

Dicas curtas, para MSX e outras plataformas. - Retrópolis

Essa veio do amigo Fabio Santos, em um dos grupos de MSX no Telegram: Se você precisa trocar o cabo de força de algum dos seus micros clássicos, procure por esse cabo aqui, para substituir no seu micro. Ele usou para substituir em alguns Hotbit, mas creio que serve em qualquer micro clássico com fonte

Retrópolis - A cidade dos clássicos

@nonius yeah, it was good to have it out again, especially introducing it to the next generation. 💚
Did notice that the disk drives on one of my #NMS8250's are having issues (which don't have belts to replace, so I wonder what's up...), and I was having some video glitches (screen turning magenta, and reseating the SCART had no effect; only a reboot worken) on the other; which was a bit disheartening.

Wouldn't mind having a #GR8NET some day, but for now that's an expense I can't yet justify.

Hah, that's neat!
#ThomasGlufke made an #Instagram client for the #8bit #homeComputer #MSX:
https://www.youtube.com/watch?v=L-G7gzgepdA

It's even compatible with the very first version of MSX, #MSX1!
(Of course you do need an HTTP capable network cartridge such as #Gr8net for it though.)

Discussion topic at #MSXResourceCenter:
https://www.msx.org/forum/msx-talk/software/msx-instagr8-instagram-for-msx1

MSX Instagr8 - The Instagram for MSX 1 computers

YouTube
@bitsofbas@mastodon.technology but yes, the #Gr8net does seem like a much simpler (though probably more expensive) solution. :)