If it shows Unauthorized but if you do not see the RSA prompt on the phone, do the following.
Identify all the duplicate entries in the path. Remove duplicates.
I required "Default USB configuration" to be set to "MIDI"
Windows 10, current as of 24 June 2019.
Samsung Galaxy S8 plus.
After 6 months of trying random things and being frustrated I figured it out today!
Of course I had done the obviously necessary steps:
a. On the phone, enable USB Debugging through Developer Options:
The simplest (and, of course, tricky) way is to use nping. For example:
nping -c <ping_count> --tcp -p <your_ftp_port_number> <ip_address_of_your_phone_hosting_ftp_service>
Achieve same goal without modification of Android.
A li-ion battery is charged in stages. C refers to a measure of Charge which to my understanding is not a scientific calibrated measurement, but moreso a general approximation of how much energy the battery can provided in an hour.
If the battery is deeply depleted, we must slowly trickle charge the depleted cells at a rate of < 0.2C to avoid overheating ...