I don't know why you're saying that. If there is a connection failure, the file won't be written or will be corrupt. SD cards don't get "ruined" by anything like this, unless I am mistaken.
The file must be written in chunks because the printer simply does not have enough memory. If you are writing to the sd card and it loses connection you can cause permanent damage to it. This is why you should always safely remove SD cards
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asb 7
If the SD card in the UM2 can be accessed through the USB connection, it will not "ruin your SD card". It's definitely not slow, even with USB2 the card reader in my DSLR is much faster than the built-in card reader in my PC. All digital cameras and many MP3 players work exactly like this. I have read and written hundreds of thousands of files through USB from and to SD cards, and I never have encountered a damaged SD card or a damaged file.
The only question is *if* the hardware in the UM2 is as smart as the components of a MP3 player that costs 1/10th of an UM2. If it is not, the hardware should be enhanced and this would be a feature request for Ultimaker 3.
Edited by GuestLink to post
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