I have lost some of my Xbox One game captures after updating the console

Always save your recorded clips otherwise you might lose them. There is nothing you can do now but I suggest you to always make a back up.

Thanks for your advice. : )

I thought that the clips saved automatically though...

Do i have to manually upload them to OneDrive/Live in order to save them?

I couldn't do this as the Xbox needed to update as soon as it connected to the internet.

It's not related to the update.

The Xbox console has only a limited amount of reserved space for captures, so if that limit is reached, new captures will "push out" older captures.

If you wish to keep certain captures permanently, you need to use Upload Studio to upload your captures to OneDrive for example.

I know exactly what you are talking about and this is not the case. EVERY capture I had before a certain time disappeared. Not to mention this was on a less than 1 year old Xbox One X. I had my prior console since launch, taking many many captures and never
had an old one removed. Even if you were correct and I somehow took more captures in a year than I took in over 3 years on my other xbox, it wouldn't cause everything to disappear. It would gradually push old ones out. Several other people have reported
to me that they have lost captures after this update and even prior updates, and looking at when I lost mine, it happened right about the time the July update was applied.

Typically you want lots of room for updates especially xbox one os updates

I peraonally dump all my games and have my external.hdds as default install

300meg to 2gigs for updates after which they goto the xbox reserved area of your hdd

Id keep it fairly clean of excess usesage

I have multiple.terbytes of hds

I understand what your saying but there's reserved space on consoles for OS updates.

The same goes for captures to the Internal HDD.

Ever wondered why you're missing captures not uploaded to the cloud?

There's only so much allocation space, that and formatting.

Thank you for your reply.

I want to clarify several moments:

1. I mainly capture images, so even with 14 MBs per capture I highly doubt that I could reach the 50 GB limit over two years.

2. My console now constantly removes new captures, even though it deleted them all a couple of days ago. So either the limit is inaccurate or there is no limit, or it is determined incorrectly.

3. People are reporting that their new consoles have been doing that from the start, when they only had around 30-40 captures. So again, either limit is inaccurate or something else is going on.

4. My console now randomly removes some images from internal storage and some from Xbox network - so now two storages are suffering and neither is stable.

5. I saw reports of people having issues with OneDrive as well, when captures were not uploaded, even though the process have started, and then captures were deleted by the console itself.

6. What is the point of deleting my captures manually if the console is doing that just fine? I don't want to delete them, I want to preserve my gaming history.

7. I tried connecting an external HDD to the console, and at one time it just magically vanished from Captures app, so I couldn't even access my captures, even though it was clearly identified in Settings and set as a capture destination. It was remedied by console reboot.

8. I have reports of people disabling uploads to Xbox Network, and the console would still delete the captures - meaning they will be lost forever.

So to sum up, there is no one clear, stable and reliable way to store captures on Xbox consoles, as either approach may lead to you losing all or some captures.

This should be addressed as a real and serious issue by Microsoft and fixed with a firmware probably. And Microsoft should not offer questionable workarounds and just fix what is broken.

You ought to escalate this to the technical department.