Why is copying from SD card so slow?

Copying photo files from cfexpress type a card to PC hard drive.  Copy process is very slow.  Norton 360 is showing unauthorized access  blocked activity for each file being copied.  The Norton 360 is using as much disk time as the copy process.  Is there a way to stop this 'unauthorized access' warning?  Not sure why something is 'unauthorized'.

Thanks for any info.  Task manager screen shot is attached.

@SoulAsylum
my reply was response to OP asking "why something is 'unauthorized'" 

@bjm_ I have never seen nor dealt with any external memory card degrading system performance when transferring file via USB or otherwise. Especially, have never seen "singular" entries in Norton history for every file read/write. CFExpress cards are extremely fast, the only limitations for file transfer should be the system hardware and bus capabilities. IE, USB 1 / 2 / 3 capabilities and where the system may have to become backward compatible to use the connected devices. From the screenshot the OP provided, nothing I see there suggests malware nor the over usage of system resources for what is being done, their issues are with the logging. The OP said:

The Norton 360 is using as much disk time as the copy process.  

 Disabling removable media scan setting should prevent the constant logging for transferring files and annoyance it presents. 

SA

The Unauthorized Access Blocked messages in your security history are logged by Norton Product Tamper Protection when an executable file attempts to read/write/edit/delete a Norton file.  Common Windows processes like svchost.exe, taskmgr.exe, dfrgntfs.exe, etc. as well as executable from third-party software will cause an Unauthorized Access Blocked message to be logged if they touch a file from your Norton installation. Please see post <here> in the Product Suggestions board regarding logging of these blocks. (credit Imacri)


Norton Product Tamper Protection events are not reports of malware.  Unauthorized Access Blocked (Access Process Data) messages in your security history are not reports of malware.  The most common Norton Product Tamper Protection log entries are legitimate Windows processes that Norton is preventing from accessing Norton files or processes.  


Norton Product Tamper Protection events are normal, as legitimate programs and Windows processes frequently try to access Norton files or processes.  Norton blocks attempts by outside agents - even legitimate Windows processes.  There is no need to do anything.  No need to scan with a third-party anti-malware program, no need to change services settings.  These events are not attacks.  They can be ignored.  Unless the actor in the logs is an actual malicious process that does not belong on your PC, these events are totally harmless and routine. (credit SendOfJive)

Hello. Have a look at this setting and change it to off. Lets see whether that helps.

removable media scan settings.png

SA