machine error ? card error ? user error ?
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did you investigate/report & learn/share from all the other occasions this happened to you ?
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until you truly get to the bottom of the why, backup as soon as something becomes important enough to you to minimise the pain when the ‘mysterious crashes’ occur
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there’s next to no detail in your post to help anyone help you get to the bottom of it - you talk about ‘project crashing’ and ‘mysterious crashes’ - is that what you mean or do the samples simply vanish ? did you consider using a mac/pc tool to recover the samples - were the samples loaded to or recorded to the card ? did you use the card on a pc in between ? did you work on other projects ? use third party software ? do you collate your samples in the project or general folder, what steps did you do last time it worked etc etc … details - otherwise it’s best to google here for an analogous prior case (i had not a lot of joy on a quick try … Tell me I didn't lost a year work)
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not suggesting shit doesn’t happen, but there is a shit load of hyperbolic ‘blaming’ posts that turn out to be user error - it’s best to be open from the off, then everyone learns/benefits when it’s thrashed through one way or another