Have you tried using Google to find out what the error code actually means ? Very often, the first step in defining and correcting an error is to find out what has caused it.
Is the card you bought compatible with your camera? Older cameras cannot work with newer versions of memory cards. SD, SDHC,SDXC etc. have different form factors and old model cameras are not compatible with newer versions.
If the problem is related to the card, you might like to re-format the card from a computer before inserting it in the camera and then format it again from the camera.
Check and verify that before you try other solutions.
Check if in settings you have something like: lokalizacja (location) or jezyk (language) and change from "polski" to english "angielski"Changing the display languageYou can change the language used for the on-screen display and error messages from ENGLISH to another language.MENUUse ac to select the language you want to use.• You can add another language to your camera with the provided OLYMPUS Master software.For details, refer to Help in OLYMPUS Master software. g “Using the OLYMPUS Master software”
Is this an SD card or SDHC card ? If so, have you inadvertently set the write-protect switch to 'ON' ?
To read it on your computer, you will need to get a USB card reader that will read your particular card, then connect this to your computer, which should treat the card as an extra drive.
You say the card has been in use for several years - it may just be corrupted or at the end of its useful life - I should consider replacing it soon.
I suggest you attempt to reset the device which should bring back default settings. If you wish to do a reset, go to Device Menu, go to Reset Settings, click + to select start then click OK.
• Windows: The voice recorder is recognized and displayed in the [My Computer] folder with the model name as the drive name. If there is a microSD card in the voice recorder, it can be used as the [Removable Disk].• Macintosh: The voice recorder is recognized and displayed on the desktop with the model name as the drive name. If there is a microSD card in the voice recorder, [NO NAME] is displayed. • For information on the PC's USB port, see the PC's user manual. • Use the optional USB extension cable (KP19) if needed