When the file names are corrected (they are in the incorrect format for a .fzpz file) the files load and the part works.
part.Micro_SD_card_reader_1.fzp
svg.breadboard.Micro_SD_card_reader_1_breadboard.svg
svg.pcb.Micro_SD_card_reader_1_pcb.svg
svg.schematic.Micro_SD_card_reader_1_schematic.svg
which when zipped and renamed .fzpz creates this working part. Your svg files are in the incorrect format for a .fzpz file (although they should work in parts editor which I rarely use.)
micro_sd_card.fzpz (6.4 KB)
the following tutorial may help you out as it covers this I believe. Running your parts through FritzingCheckPart.py may also help as it will flag many common errors.
Peter