The file asdm-7181-152.bin is a software image for the Cisco Adaptive Security Device Manager (ASDM), specifically version 7.18(1.152). It is used to provide a graphical user interface for managing Cisco ASA firewalls.
Look for free space. If less than 50 MB, delete obsolete files (old .bin images, core dumps, or logs) using delete flash:/filename. asdm-7181-152.bin