The best replacement for micro sd is sdhc.

The best alternatives to micro sd are rated as following:
★★★★★  sdhc
★★★★  mini sd
★★★★  sd
★★  micro sdhc
★★  m2
★  transflash
★  tf
★  sdxc
★  micro sdhc card
★  ultra micro sd
  memory stick micro
  micro sd hc
  sdhc difference
  tf card
  micro m2
  sim card
  sim
  sdhc card
  mini
  hc
  16 micro sdhc
  mmc
  micro sim
  rs mmc
  microsdhc

Your alternative for micro sd is not listed? Suggest!
Speaking about micro sd, one probably shouldn't forget about hc.

Other search terms related to micro sd and their ratings are:
★★★★★ hc
You have in mind a companion for micro sd and it is not yet here? Propose!



Google Trends

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micro sd
sdhc
mini sd