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I am continuing to download my 24k books into CC. I am up to the G's (title) now.
I am running Android 6 on Samsung S7 Edge Exnos version. I have the Calibre Library on the SD Card. I have the CC folder on the SD card. I connect CC to the local cloud caliber library. The SD card is a 64 gb card that boasts 90 mbs read AND write times. The SD card was formatted by Android.
CC is then reading the book file from SD calibre library then writing the book file to the CC folder on the sd card.
The download times are very very slow. It takes minutes for each book file.
Before I started this I experimented. I put both the Calibre Library and the CC folder in internal memory. It took ~0.2 seconds per book.
Clearly the slowdown is in Android's process for reading/writing to/from the SD card.
I connected to Calibre as a wireless device. Download times are minutes per book when downloading to SD card. Very fast when the CC folder was in internal memory.
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