Hi @karwas,
It seems have problems moving files around the usage stats folders… Try this FAQ: My published file views or statistics reports shows no data. What do I do?
On top of that, which OJS version are you using? Check for a folder named scheduledTasksLog under your files directory, and if it exists, try opening the last file starting with the string "Usagestatisticsfileloadertask- ", it might tell you whats wrong.
Regards,
Bruno