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Why does data transfer through WiFi become slow?
Hardware
Rui Zhang
2 years ago
6 Relevance
If the system has a large amount of survey data, it may affect the data transfer rate. Sometimes a very slow SD card makes the system unresponsive; to the user this can look like a slow/bad network connection. Therefore, it might be useful to clean up the SD card and USB drive. Delete the Geometrics.log file on the USB drive. Clean up the survey data on the SD card: First, make sure that you have all the data that you need off of the SD card. Either download all survey data that you want to keep, or copy all of the contents of the SD card to another drive (perhaps to a PC). Delete all of the data on the SD card, doing one of the following: Use the UI to delete all of the surveys, then use the "Clean old files" button on the Admin page to empty the recycle bin on the SD card. This can be VERY slow, and because the MagArrow has a very simple web interface, the user will get no useful feedback. On a very full SD card, this process might take 30 minutes or so. Or.... Remove the SD card from the MagArrow and after copying any data that the user still hasn't saved to a PC, format it or delete everything on it, then re-insert it. Be careful not to lose the SD card or to let it drop into the inaccessible spaces in the instrument. If you format the SD card, the ExFAT format is preferable. If the customer can't get the data downloaded from the instrument (takes too long or stops), the data can be imported into a survey in Survey Manager, directly from the SD card (or from the PC hard drive to which the SD card data has been copied). Then the SD card can be cleaned up or formatted. With the new version of Survey Manager (you need to update that also, not just the instrument software), the user can import a large survey, including all of the files in subdirectories, by selecting the "acquinfo.txt" file in the root directory of the survey, from the SD card. More details about how to import/export SD card files using Survey Manager can be found in the post below: SD card files conversion
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