Changing your card every time you change batteries is not only unnecessary, but creates multiple additional opportunities for something to go wrong, get broken, or get lost.
Quite the opposite.
Once you bring the drone back, sending your files out again and again,is an unnecessary risk.
You could lose everything on the card in one incident.
This advice is only for those who value their work and don't just fly in their backyard or the local park.
Although getting the biggest SD card is a popular option with forum members, if you value your imagery it might not be a good idea.
Whenever I see questions about the biggest SD cards I'm reminded of a story of a "pro" shooting a music video with his Inspire on a boat off Miami.
He was one of those get-the-biggest- SD-card guys because bigger is always better?
He had been shooting all day and and at the end of the eighth flight when bringing his inspire in, it hit an outrigger pole on the game boat he was using for a camera boat.
The Inspire went straight down in a busy shipping channel with his whole day's work on his expensive high capacity SD card.
He was disappointed about the Inspire but more concerned about the work he'd lost.
The full story is here:
Well, it Happened. RIP Little bird. I'll miss you :/ I was involved in getting the aerial shots for a music video they were filming off of star island in Miami. I had flown very tight and technical all day, pulled off several landings onto the front of a moving yacht, in the wind. And even...
inspirepilots.com
You only need about 8-10 GB to hold a whole flight of full 4K video or over 3000 jpg photos.
It makes a lot more sense to have several small cards and swap out between flights so that you don't risk losing precious work every time you fly.