Hi - It's been a while, but I finally sprung for a SONY branded 64GB SDXC card with the intent to use it in the HDR-CX550v. Well so far I can't get the vidcam to format the card. The SONY online specs for this model definitely include SDXC:
Media Type : 64GB Non-Removeable Flash Memory; Memory Stick PRO Duo™ MARK2 Media and SD/SDHC/SDXC (Class 4) media (Sold Separately)
Then I checked the latest online owner's manual and I found these notes:
Types of memory card you can use with your camcorder
Only “Memory Stick PRO Duo” media, “Memory Stick PRO-HG Duo” media, SD memory cards and
SDHC memory cards can be used with this camcorder. A MultiMediaCard cannot be used with this
In this manual, “Memory Stick PRO Duo” media and “Memory Stick PRO-HG Duo” media are called
“Memory Stick PRO Duo” media.
Memory cards of up to 32 GB have been verified to operate with your camcorder.
This definitely appears to ignore the SDXC card option, which begins at 64GB. So I may be stuck with a useless SDXC card.
Thus, my love/hate relationship with SONY continues......but I still love the Videocam