I have no idea how big they are? , i canT open them at all.. I dont have any apps on my sd card so why would they be log files of apps? Like i said, i only have photos,videos, and music on my sd card
Apps are able to write to the SD card storage, though they should be restricted to a directory that is built during app installation, and generally apps will use internal storage over SD storage.
We would need to know more about the files in question...
1. the description of "two white sheets of paper" refers to an icon for the file that would be generated by a file explorer (I'm assuming). It sounds like a generic file icon, but it may help to know what file explorer you're using to view these files.
2. Are the files on the root of the SD card, or are they in a folder(s)?
3. Do the files have extensions at the end of the file name? (i.e. ".log" or ".txt" or ".doc")
4. To see the file sizes, if you're using a file explorer in Android, generally you hold down on a file you can choose "properties" to see additional info, including the size of the file.