How do I capture pop up error messages?

fm/2 writes all popup error messages stderr. To capture these messages, start fm/2 with

fm3 2>&1 >fm2.log

or

fm3 2>&1 | tee fm2.log

How can I get better scan performance with Netdrive drives?

Netdrive drives tend to be slow particularly on initial scan. If you avoid "root directory" mount points the scan speed is greatly enhanced. This can be forced by a setting in the Netdrive configuration file. The drive information scan can also be very slow. You can fix the speed by configuring netdrive to return "fake" information about the drive. The down side is the drive size free space etc are not the actual sizes. This is also a setting in the Netdrive configuration file.