Slow work with files on the memory card?

Question

OpenStreetMap

The card reader ( Ginzzu GR-137U ) deletes files from the bundled Nokia 5800 card no faster than one per second. Also, when writing to a Win7 card, it first waits for something (and the larger the file, the more it waits), then writes at a speed of ~ 10 MB / s.
But at the same time, reading from the card is performed at a speed of 20 MB / s, and a 700-megabyte backup of the phone to this card became the same phone in less than 10 minutes.
How to make a card reader work with a card no worse than a phone?

Answer 1

10Mb / s for a complete card is very good ... Try to run some test for read / write speed through the reader and through the phone. If there is a serious difference in the results, then I can only sin on firewood or a card reader malfunction.

Answer 2

Such a card, since there is the term "read / write speed", and there is "access time". Here is the access time for this card is high.
If the same operation from the phone and with the same files, of the same volume , takes place at different times, then try with another card reader and / or on another computer, it will become clear what the problem is.

Answer 3

Win7 optimizes the drive for safe ejection by default, which is why writing lots of files is so slow. You need to change this setting for your device and everything will be fine.