B4A: Serious error: pkg:/data/local/tmp/Designer.apk Failure INSTALL_FAILED_INSUFFICIENT_STORAGE rm failed for -f, Read-only file system ..... PhilMac
Thank you NJDude, I chose a different emulator and set the RAM to 512 and simulated SD card of 250Mb. No more errors. PhilMac.The answer is right there on the message itself, there's no more room in your device, you can try restarting your device or removing apps from it.
Genymotion, which is widely used, is very close to a real device (bugs that you can see on real devices can be reproduced with Genymotion). And, unless you have plenty of devices at your disposal, developing an app is complicated without an emulator.I strongly recommend the use of a real device, the use of emulators should be avoided for many reasons.