Maybe ExFat is the problem.. my corrupted files were copied to ExFat. Shame on me x10 not formating the SSD to APFS. But I would have to be crazy to trust iPad with my footage again.
ExFAT is only a problem on Apple Gear (even on mac's each new iteration of the OS starts out with ExFAT problems, it seems).
Lot's of - even really cheap - cameras have used ExFAT for years and years, and also in professional use cases, where damaged files equals lost income (and popularity sinks for that manufacturer ;-) ExFAT has been the file system gold standard for near twenty years.
Only Apple seems to have persistent problems on the ExFAT front.
My Windows gear has had a trouble free life since Windows 7 (can't remember, if ExFAT was in standard use on Windows 2000 and Vista, anyway, that's of no consequence today). Even my Samsung Android smartphones have worked with native ExFAT support without problems with internal or external memory/disks with ExFAT format for years. Without crashing, data loss and all the other weird experiences inherent in iOS and iPadOS. Even with far better performance to external USB-C based gear.
My iPad Pro's have long been relegated to "web browsing only" and other simple tasks (playing a video or an audiobook, reading an Amazon Kindle book etc.).
My really oooold Microsoft Surface Pro 4 - from late 2015 (?) - runs rings around my iPads - also when using terabyte disks etc. through any half decent hub available on the market. At far higher transfer speeds in real life. Without damaging external media file content. For years and years it's been that way. Day in, day out. Anywhere. Except for a short stint using iPad Pro's in 2017 (or was it 2018?) my goto travel tablet, has been the Surface Pro. Still is.
In Windows circles, it's become somewhat slow, but it's reliable, and I can still use real Pro tools, (no crippled finger play toys linke on Pad). Tools like Lightroom Classic, the Affinity Photo, Designer and Publisher tools. The Microsoft pencil also works as advertised (A built in battery typically lasts 3-4 years and costs a few dollars to renew). Networking is standard Windows networking, and not the weird and wonky Apple iOS/ipadOS File handling, where you're never sure about what goes on. Or if it does, at all ;-)
The Microsoft Pro 4 is old. It's slow by any modern Windows or Mac standard, but it gets the things done. Reliably, in a controlled and verifyable manner - with an abundance of Windows tools available. I haven't lost image files travelling anywhere in the world. The Surface Pro 4 is a true frequent flyer - probably half a million miles in the air, really long distances in trains and crossing oceans on sea. Traveling all continents except Antarctica. It's even survived an accidental "Lemon Ice Tea" bath - leaking flask in my shoulder bag - and after being dried a few hours, it - lucky me - has continued working for around four years since. Still alive this moment, backing up in standard, background fashion from it's temporary seat on my sofa table to my NAS.
If Apple can't get their act together and deliver decent and reliable ExFAT support, they're.... ahem... you decide, what to call the oafs in Apple operating system development. It's not that the companys handling problems has been unknown - for several years even.
Ah... that helped!!!
Regards and a big smile.
P.S. I love, that the mac's treat the Windows NTSF file system as readonly only. That way, content never gets whacked by macOS in some initial flux or unknown reliability state owe the years ;-)
