uDrive writing problems

[martina]

Hi,
I'm trying to write a file to the uDrive, but that's not working. Red led turns on after sending the writing command but after allocating the file nothing can be written in it (it only happens when i try to write in append mode). Red led remains on till i turn off the card and when i go check it i always find empty files..any clue?
Thanks,
Martina

[ESPsupport]

How big is the file? (it can take a while to seek to the end of a large file)

Does a windows chckdisk give the drive a clean bill of health? (can you post the output)

Have you changed he drives make/model recently?