...
dir <PATH>
{ flash:critlog/FILE | flash:syslog/FILE | flash:backup/FILE | flash:data/FILE | tmpsys:syslog/FILE | system:access-points-firmwares/[FILE] | crypto:cert/FILE | crypto:dh/FILE | crypto:ta/FILE | crypto:crl/FILE | crypto:csr/FILE | crypto:pfx/FILE | crypto:private-key/FILE
| crypto:public-key/FILE | usb://<USB-device-name>/<PATH> | mmc://<MMC-device-name>/<PATH> | hdd://<HDD-device-name>/<PATH> }
...