What are all the "DiskCacheIndex*.tmp" files on my phone? I have about a dozen files named DiskCacheIndexnnnnnn.tmp in my /mnt/sdcard, where nnnnnnn is some number.  All of these are emtpy:



What are they for?

Who created them?

Is it safe to remove them?
Its the cache files for the sd card itself, its safe to delete.It is produced by apps which store data into sd card.You could tell the apps not to store it on SD if you like, if the app supports it.