Our team is looking into this issue. It appears to only be affecting Asia servers unless someone else can state otherwise. If you have items uploaded I would recommend trying to download on a non-Asia server for the time being so the data is not deleted after the 24h period as this cannot be reverted. Rest assured that we are looking into this as quickly as we can and will find a resolution.
Would you guys be able to provide me with what server you are transferring FROM and what server you are trying to transfer TO? If its just uploading an item or creature, let me know what server this is.