“Insufficient storage” when trying to install new app

Question

Every time I go to install a new app, I get the message "Insufficient storage", and an unable to install anything!

I have spent quite a long time moving every possible app to the SD card, and still most of my space on the phone is gone.

However, that isn't even the weird part. I have 250mb of free space on my phone, and it still unable to install even 300kb apps. I read this answer, but that is mentioning space as small as 13mb remaining, while I have as much as 250mb!

How much space is required on my phone to install a simple 300kb sized app???

^{Btw, I am running the newest second newest (this problem is getting so bad, I can't even install an update) update on an HTC Thunderbolt, which I believe is android 2.3}

Answer 1

In short: 25 MB free internal storage is minimum requirement (source: TechniPages, AndroidCentral). If free space falls below that, the "insufficient storage" error is triggered.

For details, see:

• Why does my phone keep telling me it has low storage?
• Not enough storage on android device
• Android “Internal Storage” used but not reported
• I keep getting storage errors but I have plenty of free space, what is safe to remove from internal storage?
• HTC Desire low on internal storage, I'm clueless — Any help?
• Message Memory Full, Incoming message rejected

And many more -- this is a quite "frequent question". For more results, simply follow the internal-storage tag.