How to clear the Dropbox mobile app cache on iPhone/iPad?

[Marcus D.9]

Using an iPhone 5C running iOS 9.1 and Dropbox 4.0.4. The iOS Dropbox app itself is only 55.8 MB in size, however my iPhone is reporting that Dropbox is using a total of 300+ MB in Documents and Data. I have zero files marked as "Offline" within the Dropbox app, so the app should not be storing any Documents or Data locally on my iPhone.

I realize the Documents and Data referenced are most likely the result of recent files being cached by the app, but if this is the case, is there any way to manually clear that cache? Or set a limit of cache size? Currently, uninstalling and reinstalling the app is the only solution I've found, which is far from what I'd consider a "solution". I have to uninstall the app, reinstall it, sign in, wait for 2-factor auth code to enter, set up my Passcode again, set up the Camera Upload again...just a horrible overall process just to clear out the cache.

There are other apps which allow you to either set a cache size, or some that include an option to manually clear the cache. Either one of these options would be better than nothing at all.

[Marcus D.9]

If you select Settings, you'll see your account that's being used (your email address). If you then select that account, you don't have a Clear Account Cache button at the bottom?

[Transcribe O.]

No, unfortunately there isn't a clear cache option. This is MS OneDrive software version 4.1 running on an iPhone 4 with iOS 6. What type of phone and what software version do you have with the clear cache option?

[Marcus D.9]

Ahh, there it is. Current version is v7.8, and Clear Cache option was added in v6.5 per their change log.

[Transcribe O.]

So, I shall wait and see. The other part of your argument was about how frequently an app self-clears its cache. Perhaps OneDrive is more frequent than DropBox.

[Transcribe O.]

It has been 5 days since I removed Dropbox and added MS OneDrive to the apps on my old iphone 4 (which has little memory).

So far I am very happy because OneDrive is #23 in the list as far as using memory is concerned. To compare, Dropbox was the #2 memory hog, second to photos. It was using between 150 and 200 MB.

But so far, OneDrive is only using 25MB of the precious iphone memory.

So what's up? These are the same files on OneDrive that I had on Dropbox.

[Marcus D.9]

@Transcribe during those 5 days, have you been actively accessing files on OneDrive on a frequent basis?
Open OneDrive and open up a handful of documents and images, then check the usage again.

[Robert S.27]

I don't want to sign out and reselect my 4 dozen or so offline files.

Please make a clear the cache button. Heading to the App Store.

[Transcribe O.]

Marcus D, no problems with the iPhone memory being taken by OneDrive or changing when I open files in OneDrive. BUT there is a new problem, very strange, that I never had with Dropbox: OneDrive is deleting all the cloud files in response to a delete I made on another tablet (not the iphone). Details below.

[Transcribe O.]

I have a Winbook tablet with almost no memory on it. As soon as I activated OneDrive on the iPhone, I also signed into OneDrive on the Windows 10 tablet. OneDrive immediately copied all (as many as it could) files from the cloud onto my tablet hard drive, filling it completely so there were 0 bytes left. What?!! Actually, to be fair, I wonder if it is OneDrive or if it is the cloud Transfer service that I used called MultCloud. So I responded by deleting the files on the tablet hard drive and... When I opened OneDrive on the iPhone all the folders were empty. I'm a little slow to understand, so I use MultCloud again to transfer the Dropbox files to OneDrive. The Winbook tablet hard drive fills up again. To be continued.

[Transcribe O.]

For a second time I deleted the unwanted transferred files from the tablet and... the cloud OneDrive lost all its files again. Crazy. Then, I decided to remove OneDrive from the tablet. Ha! Not easy. Took an hour of Googling to find the secret formula, because Microsoft does NOT want you to delete their apps from their Windows 10 OS. Now OneDrive is deleted from the tablet and I need to restore the files to the cloud OneDrive. I'll wait a day or two and try a different cloud transfer service to bring the Dropbox files over to OneDrive. The files are always greener on the other side, (Old saying)