Look into your ttgo.bif. After a succesful flashing you must find these string (in case of 3.2.5, with 3.6.0 accordingly this string):
GPSFirmwareVersion=GSW3.2.5TT3-CRC32_3.3.01.06-C35P3.00
With this gps firmware, a Gox20 / 30/7000 always finds the satellites. Whether from standby or after a cold start (eg with suicide.dat or after reset). You don't need a filled folder "ephem" in the future. You can also delete the complete folder. Try it!
P.S: Your current NC (internal memory) has no influence on the flash process.