16GB Storage - MicroSD Expansion up to 512GB. Storage 16GB (with MicroSD card expansion). Content Formats Supported Kindle (AZW), KF8, TXT, PDF, unprotected MOBI, PRC natively, Audible Enhanced format (AAX), DOC, DOCX, JPEG, GIF, PNG, BMP, Dolby Digital (AC-3), Dolby Digital Plus (E-AC-3), non-DRM AAC, MP3, MIDI, PCM/WAVE, OGG, WAV, M4V, MP4, AAC LC/LTP, HE-AACv1, HE-AACv2, MKV, AMR-NB, AMR-WB, HTML5, CSS3, 3GP, VP8 (WEBM).
