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Until about 2005, most desktop and laptop computers were supplied with floppy disk drives in addition to USB ports, but floppy disk drives became obsolete after widespread adoption of USB ports and the larger USB drive capacity compared to the "1.44 megabyte" (1440 kilobyte) 3.5-inch floppy disk. The ability to retain data is affected by the controller's firmware, internal data redundancy, and error correction algorithms. However, as with any flash storage, data loss from bit leaking due to prolonged lack of electrical power and the possibility of spontaneous controller failure due to poor manufacturing could make it unsuitable for long-term archival of data. Additionally, they are less vulnerable to electromagnetic interference than floppy disks, and are unharmed by surface scratches (unlike CDs). Compared with floppy disks or CDs, they are smaller, faster, have significantly more capacity, and are more durable due to a lack of moving parts.
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Some allow up to 100,000 write/erase cycles, depending on the exact type of memory chip used, and are thought to physically last between 10 and 100 years under normal circumstances ( shelf storage time ).Ĭommon uses of USB flash drives are for storage, supplementary back-ups, and transferring of computer files. As of 2018, 2 TB flash drives were the largest available in terms of storage capacity. As of March 2016, flash drives with anywhere from 8 to 256 gigabytes (GB ) were frequently sold, while 512 GB and 1 terabyte (TB ) units were less frequent. Since first appearing on the market in late 2000, as with virtually all other computer memory devices, storage capacities have risen while prices have dropped. It is typically removable, rewritable and much smaller than an optical disc. Both versions can be installed together.A SanDisk Ultra Flair USB drive from 2020, attached to an HP laptopĪ USB flash drive (also called a thumb drive) is a data storage device that includes flash memory with an integrated USB interface. Optimized for new devices with big high resolution screens. crashes while reading) try to remove directory SD/.cr3/cache and book database files SD/.cr3/*.sqliteĪs well, consider using "Cool Reader GL" - cross-platform Cool Reader version with UI rewritten in C++, with hardware acceleration based on OpenGL. To donate this project, you can buy Cool Reader Gold ($10), Silver ($3) or Bronze ($1) Donation package from Market WRITE_EXTERNAL_STORAGE - to access SD cardĬoolReader is free, open source (GPL), multiplatform project. (/cr3/ directory can also be used instead of /.cr3/, and internal SD or internal storage instead of /sdcard/)ĬoolReader requires following permissions: Place additional textures to /sdcard/.cr3/backgrounds/ - to be used as stretched page backgrounds. Place additional textures to /sdcard/.cr3/textures/ - to be used as tiled page backgrounds. Styles can be customised in wide range using external CSS.
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Paperbook-like page turning animation or "sliding page" animation.ĭictionary support (ColorDict, GoldenDict, Fora Dictionary, Aard Dictionary).Īutoscroll (automatic page flipping) - start using menu/goto/autoscroll or assign action Autoscroll on key or tap zone Change speed using volume keys or bottom-right and bottom-left tap zones stop - tap any other tap zone or key.Īutomatic reformatting of. Support for Chinese, Japanese, Korean languages autodetection of TXT file encoding (GBK, Shift_JIS, BIG5, EUC_KR).ĭay and night profiles (two sets of colors, background, backlight levels).īrightness adjustments by flick on left edge of screen.īackground texture (stretched or tiled) or solid color. Most complete FB2 format support: styles, tables, footnotes.Īdditional fonts support (place. Table of contents, bookmarks, text search.īookmarks on text fragments (comments or corrections) - useful for proof reading.īuilt-in file browser, quick recent books access.
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Supports epub (non-DRM), fb2, doc, txt, rtf, html, chm, tcr, pdb, prc, mobi (non-DRM), pml formats.