micro sd card adapter for macbook not working

I figured there must be something wrong with the card so I have formatted it several times using disk utility using exFAT. I thought there may be a problem with my Macbook's SD card reader, so I cleaned it out - didn't work, so purchased a Trascend USB 3.0 micro SD card reader to do away with the adapter all together. Yes I have checked and checked again the adapter lock position, I have tried it up, down, halfway, mostly up, mostly down, inserting closer to the screen, further from the screen.everything. When I look at the properties for the Micro SD card it shows as 'You have read only access'. Everything was fine until I tried to delete the data on the card.

I recently purchased a new 64GB micro SD card from Sandisk which I wrote photos on via the SD Card Reader and Adapter on the Macbook pro. And test your problem.This is driving me mental I feel like I've tried everything. Alternatively, select your card and then press the Return/Enter key on the keyboard and then enter a new name.Click to open the Name & Extension option.Select it and right-click (control-click) it.If it does not appear on the desktop, first go to Finder > Preferences > General > and ensure that the “External disks” option is selected (as shown in the image below:). Some users have reported that renaming the card fixed their problem.Then follow the onscreen instructions to complete the resetting process.You will need to choose a format option from the dropdown menu. Select your SD card, it can be something like NO NAME or UNTITLED.Open Disk Utility on your Mac (Applications > Utilities).Please note that doing so will delete all the data off of the card.

Use Disk Utility to reformat an SD card.

You may also use a toothpick to pull debris out of the slot. You can also try blowing it out yourself.

What you can do is to clean with compressed air. There may be debris of some kind in the slot. You may want to clean the contact area with a soft brush. You can check for updates by going to System Preferences > Software Update. Ensure that your Mac has the latest version of macOS.It’s always a good idea to take a few moments to restart your Mac to see if that happens to fix the issue.

A restart of your Mac may fix your issue.

Micro sd card adapter for macbook not working