I've test on a folder at the root of the eternal drive
this drive is a Lacie rugged HFS+ journalisé
I'va launched the console and here the result 
Citation
Sandbox: Mp3tag(3960) deny(1) file-write-create /Volumes/LaCie/MP3Tag/Fighting Nightmares EP test.m4a
Violation: deny(1) file-write-create /Volumes/LaCie/MP3Tag/Fighting Nightmares EP test.m4a
Process: Mp3tag [3960]
Path: /Applications/Mp3tag.app/Contents/MacOS/Mp3tag
Load Address: 0x10df1e000
Identifier: app.mp3tag.Mp3tag
Version: 51 (1.2.3)
Code Type: x86_64 (Native)
Parent Process: launchd [1]
Responsible: /Applications/Mp3tag.app/Contents/MacOS/Mp3tag
User ID: 501
Date/Time: 2021-09-12 18:57:27.906 GMT+1
OS Version: macOS 11.5.2 (20G95)
Report Version: 8
MetaData: {"storage-class":"kTCCServiceSystemPolicyRemovableVolumes","container":"/Users/macmusic/Library/Containers/app.mp3tag.Mp3tag/Data","vnode-type":"REGULAR-FILE","mount-rdev":16777229,"target":"/Volumes/LaCie/MP3Tag/Fighting Nightmares EP test.m4a","platform-binary":false,"rdev":0,"extension-class":"com.apple.app-sandbox.read","process":"Mp3tag","signing-id":"app.mp3tag.Mp3tag","platform_binary":"no","process-path":"/Applications/Mp3tag.app/Contents/MacOS/Mp3tag","platform-policy":false,"suffix":"Fighting Nightmares EP test.m4a","apple-internal":false,"summary":"deny(1) file-write-create /Volumes/LaCie/MP3Tag/Fighting Nightmares EP test.m4a","uid":501,"removable-media":true,"hardware":"Mac","matched-extension":false,"profile-flags":0,"build":"macOS 11.5.2 (20G95)","profile-in-collection":false,"responsible-process-path":"/Applications/Mp3tag.app/Contents/MacOS/Mp3tag","team-id":"SX5YR25689","operation":"file-write-create","path":"/Volumes/LaCie/MP3Tag/Fighting Nightmares EP test.m4a","primary-filter":"path","errno":1,"matched-user-intent-extension":false,"action":"deny","primary-filter-value":"/Volumes/LaCie/MP3Tag/Fighting Nightmares EP test.m4a","user-approval":"kTCCServiceSystemPolicyRemovableVolumes","flags":5,"pid":3960,"normalized_target":["Volumes","LaCie","MP3Tag","Fighting Nightmares EP test.m4a"]}
Thread 0 (id: 242271):
0 libsystem_malloc.dylib 0x00007fff202f3fc5 _malloc_zone_calloc + 12
1 libobjc.A.dylib 0x00007fff203505fa class_createInstance + 65
2 Foundation 0x00007fff212dc1e2 NSAllocateObject + 15
3 Foundation 0x00007fff2130f806 _NSKeyValueObservationInfoGetObservances + 56
4 Foundation 0x00007fff2130fa59 NSKeyValueWillChange + 131
5 Foundation 0x00007fff214755c6 NSKeyValueWillChangeWithPerThreadPendingNotifications + 383
6 Foundation 0x00007fff21348d79 _NSSetObjectValueAndNotify + 139
7 AppKit 0x00007fff22eab43b -[NSSegmentItemView _updateBezelView] + 132
8 Foundation 0x00007fff2130dd6c NSKeyValueNotifyObserver + 327
9 Foundation 0x00007fff212ee354 -[NSObject(NSKeyValueObserverRegistration) _addObserver:forProperty:options:context:] + 266
10 Foundation 0x00007fff212ed7ba -[NSObject(NSKeyValueObserverRegistration) addObserver:forKeyPath:options:context:] + 93
11 AppKit 0x00007fff22eaa61c -[NSSegmentItemView _setupObserving] + 491
12 AppKit 0x00007fff22eaa427 -[NSSegmentItemView viewDidMoveToSuperview] + 94
13 AppKit 0x00007fff22dd39c1 -[NSView _setSuperview:] + 1323
14 AppKit 0x00007fff22dd3273 -[NSView addSubview:] + 155
15 AppKit 0x00007fff22ea5b04 -[NSSegmentedCell _addNSSegmentItemViewsToControlView:] + 2216
16 AppKit 0x00007fff22ea7b61 -[NSSegmentedCell _setSegmentItems:updateSegmentItemViews:] + 758
17 AppKit 0x00007fff23005f73 -[NSSegmentedCell initWithCoder:] + 606
18 Foundation 0x00007fff212eaf96 _decodeObjectBinary + 2766
19 Foundation 0x00007fff212ea39c _decodeObject + 152
20 Foundation 0x00007fff212ea287 -[NSKeyedUnarchiver decodeObjectForKey:] + 162
21 AppKit 0x00007fff22e10e97 -[NSControl initWithCoder:] + 431
22 AppKit 0x00007fff23005c9c -[NSSegmentedControl initWithCoder:] + 49
23 Foundation 0x00007fff212eaf96 _decodeObjectBinary + 2766
24 Foundation 0x00007fff212ea39c _decodeObject + 152
25 Foundation 0x00007fff212ea287 -[NSKeyedUnarchiver decodeObjectForKey:] + 162
26 AppKit 0x00007fff22d85769 -[NSNibConnector initWithCoder:] + 97
27 AppKit 0x00007fff22d856a4 -[NSNibOutletConnector initWithCoder:] + 404
28 Foundation 0x00007fff212eaf96 _decodeObjectBinary + 2766
29 Foundation 0x00007fff212eca39 -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:] + 850
30 Foundation 0x00007fff21304df3 -[NSArray(NSArray) initWithCoder:] + 161
31 Foundation 0x00007fff212eaf96 _decodeObjectBinary + 2766
32 Foundation 0x00007fff212ea39c _decodeObject + 152
33 Foundation 0x00007fff212ea287 -[NSKeyedUnarchiver decodeObjectForKey:] + 162
34 AppKit 0x00007fff22d84375 -[NSIBObjectData initWithCoder:] + 166
35 Foundation 0x00007fff212eaf96 _decodeObjectBinary + 2766
36 Foundation 0x00007fff212ea39c _decodeObject + 152
37 Foundation 0x00007fff212ea287 -[NSKeyedUnarchiver decodeObjectForKey:] + 162
38 AppKit 0x00007fff22e0f414 -[NSNib _instantiateNibWithExternalNameTable:options:] + 526
39 AppKit 0x00007fff22e0f111 -[NSNib _instantiateWithOwner:options:topLevelObjects:] + 143
40 AppKit 0x00007fff238bd381 -[NSTextTouchBarItemController loadNib] + 78
41 AppKit 0x00007fff238bca18 -[NSTextTouchBarItemController textAlignmentItem] + 106
42 AppKit 0x00007fff238bdbe0 -[NSTextTouchBarItemController setSelectedAttributesWithEnumrator:] + 1029
43 AppKit 0x00007fff22ed22ba -[NSTextView(NSTextView_TouchBar_API) updateTextTouchBarItems] + 113
44 AppKit 0x00007fff22f5756f -[NSTextView(NSPrivate) _setWindow:] + 304
45 AppKit 0x00007fff23642f4a __21-[NSView _setWindow:]_block_invoke.427 + 308
46 AppKit 0x00007fff22dc9fcd -[NSView _setWindow:] + 1754
47 AppKit 0x00007fff23642f4a __21-[NSView _setWindow:]_block_invoke.427 + 308
48 AppKit 0x00007fff22dc9fcd -[NSView _setWindow:] + 1754
49 AppKit 0x00007fff22de6d68 -[NSControl _setWindow:] + 179
50 AppKit 0x00007fff23642f4a __21-[NSView _setWindow:]_block_invoke.427 + 308
51 AppKit 0x00007fff22dc9fcd -[NSView _setWindow:] + 1754
52 AppKit 0x00007fff23642f4a __21-[NSView _setWindow:]_block_invoke.427 + 308
53 AppKit 0x00007fff22dc9fcd -[NSView _setWindow:] + 1754
54 AppKit 0x00007fff2304163e -[NSWindow dealloc] + 870
55 CoreFoundation 0x00007fff2054c583 RELEASE_OBJECTS_IN_THE_ARRAY + 118
56 CoreFoundation 0x00007fff2054c4c6 -[__NSArrayM dealloc] + 279
57 AppKit 0x00007fff2302b82d -[NSWindowController dealloc] + 182
58 AppKit 0x00007fff22f8abb4 -[NSWindowController release] + 130
59 libobjc.A.dylib 0x00007fff2037020f AutoreleasePoolPage::releaseUntil(objc_object**) + 167
60 libobjc.A.dylib 0x00007fff20352e30 objc_autoreleasePoolPop + 161
61 CoreFoundation 0x00007fff2056ca66 _CFAutoreleasePoolPop + 22
62 Foundation 0x00007fff2130d0ab -[NSAutoreleasePool drain] + 131
63 AppKit 0x00007fff22da1c9b -[NSApplication run] + 636
64 AppKit 0x00007fff22d75e6c NSApplicationMain + 816
65 Mp3tag 0x000000010df90f79
66 libdyld.dylib 0x00007fff204cdf3d start + 1
67 0x0000000000000001
Thread 1 (id: 242411, com.apple.NSEventThread):
0 libsystem_kernel.dylib 0x00007fff2047d2ba mach_msg_trap + 10
1 CoreFoundation 0x00007fff205abb2f __CFRunLoopServiceMachPort + 316
2 CoreFoundation 0x00007fff205aa20f __CFRunLoopRun + 1328
3 CoreFoundation 0x00007fff205a961c CFRunLoopRunSpecific + 563
4 AppKit 0x00007fff22f3723a _NSEventThread + 124
5 libsystem_pthread.dylib 0x00007fff204b28fc _pthread_start + 224
6 libsystem_pthread.dylib 0x00007fff204ae443 thread_start + 15
Thread 2 (id: 242463):
0 libsystem_kernel.dylib 0x00007fff2047d2ba mach_msg_trap + 10
1 Mp3tag 0x000000010e19de5e
2 libsystem_pthread.dylib 0x00007fff204b28fc _pthread_start + 224
3 libsystem_pthread.dylib 0x00007fff204ae443 thread_start + 15
Thread 3 (id: 242522, com.apple.NSURLConnectionLoader):
0 libsystem_kernel.dylib 0x00007fff2047d2ba mach_msg_trap + 10
1 CoreFoundation 0x00007fff205abb2f __CFRunLoopServiceMachPort + 316
2 CoreFoundation 0x00007fff205aa20f __CFRunLoopRun + 1328
3 CoreFoundation 0x00007fff205a961c CFRunLoopRunSpecific + 563
4 CFNetwork 0x00007fff24a51358
5 Foundation 0x00007fff21332437 NSThread__start + 1068
6 libsystem_pthread.dylib 0x00007fff204b28fc _pthread_start + 224
7 libsystem_pthread.dylib 0x00007fff204ae443 thread_start + 15
Thread 4 (id: 244699):
0 libsystem_kernel.dylib 0x00007fff2047d2f6 semaphore_wait_trap + 10
1 libdispatch.dylib 0x00007fff20307623 _dispatch_call_block_and_release + 12
2 libdispatch.dylib 0x00007fff20308806 _dispatch_client_callout + 8
3 libdispatch.dylib 0x00007fff2030e5ea _dispatch_lane_serial_drain + 606
4 libdispatch.dylib 0x00007fff2030f0ad _dispatch_lane_invoke + 366
5 libdispatch.dylib 0x00007fff20318c0d _dispatch_workloop_worker_thread + 811
6 libsystem_pthread.dylib 0x00007fff204af45d _pthread_wqthread + 314
7 libsystem_pthread.dylib 0x00007fff204ae42f start_wqthread + 15
Thread 5 (id: 245019):
0 libsystem_kernel.dylib 0x00007fff2047e95e __workq_kernreturn + 10
1 libsystem_pthread.dylib 0x00007fff204ae42f start_wqthread + 15
Thread 6 (id: 245425):
0 libsystem_kernel.dylib 0x00007fff2047d30e semaphore_timedwait_trap + 10
1 libdispatch.dylib 0x00007fff20309145 _dispatch_semaphore_wait_slow + 58
2 SkyLight 0x00007fff24d97b9c CGSUpdateManager::enable_updates_common() + 1146
3 SkyLight 0x00007fff24d985b5 SLSReenableUpdateTokenWithSeed + 130
4 libdispatch.dylib 0x00007fff20307623 _dispatch_call_block_and_release + 12
5 libdispatch.dylib 0x00007fff20308806 _dispatch_client_callout + 8
6 libdispatch.dylib 0x00007fff2030e5ea _dispatch_lane_serial_drain + 606
7 libdispatch.dylib 0x00007fff2030f0ad _dispatch_lane_invoke + 366
8 libdispatch.dylib 0x00007fff20318c0d _dispatch_workloop_worker_thread + 811
9 libsystem_pthread.dylib 0x00007fff204af45d _pthread_wqthread + 314
10 libsystem_pthread.dylib 0x00007fff204ae42f start_wqthread + 15
Thread 7 (id: 245431):
0 libsystem_kernel.dylib 0x00007fff2047e95e __workq_kernreturn + 10
1 libsystem_pthread.dylib 0x00007fff204ae42f start_wqthread + 15
Thread 8 (id: 245435):
0 libsystem_kernel.dylib 0x00007fff2047e95e __workq_kernreturn + 10
1 libsystem_pthread.dylib 0x00007fff204ae42f start_wqthread + 15
Thread 9 (id: 245443):
0 libsystem_kernel.dylib 0x00007fff20480082 __rename + 10
1 Foundation 0x00007fff21386c47 -[NSFilesystemItemMoveOperation main] + 424
2 Foundation 0x00007fff2131b32a NSOPERATION_IS_INVOKING_MAIN + 17
3 Foundation 0x00007fff2131a5de -[NSOperation start] + 785
4 Foundation 0x00007fff213903fb -[NSFileManager moveItemAtURL:toURL:options:error:] + 292
5 Mp3tag 0x000000010e0d7ddc
6 Mp3tag 0x000000010df9a539
7 Mp3tag 0x000000010e0f46ae
8 libdispatch.dylib 0x00007fff20307623 _dispatch_call_block_and_release + 12
9 libdispatch.dylib 0x00007fff20308806 _dispatch_client_callout + 8
10 libdispatch.dylib 0x00007fff2030e5ea _dispatch_lane_serial_drain + 606
11 libdispatch.dylib 0x00007fff2030f0ad _dispatch_lane_invoke + 366
12 libdispatch.dylib 0x00007fff20318c0d _dispatch_workloop_worker_thread + 811
13 libsystem_pthread.dylib 0x00007fff204af45d _pthread_wqthread + 314
14 libsystem_pthread.dylib 0x00007fff204ae42f start_wqthread + 15
Thread 10 (id: 245444):
0 libsystem_kernel.dylib 0x00007fff2047e95e __workq_kernreturn + 10
1 libsystem_pthread.dylib 0x00007fff204ae42f start_wqthread + 15
Thread 11 (id: 245445):
Binary Images:
0x10df1e000 - 0x10e2edfff app.mp3tag.Mp3tag (1.2.3 - 51) <7a1b1d70-bf04-399e-b565-d9f7e8191b2d> /Applications/Mp3tag.app/Contents/MacOS/Mp3tag
0x7fff202d8000 - 0x7fff20304ff7 libsystem_malloc.dylib (317.140.5) <0aedabf0-cff7-3304-9ff8-eb3bbf0801e6> /usr/lib/system/libsystem_malloc.dylib
0x7fff20305000 - 0x7fff2034980f libdispatch.dylib (1271.120.2) /usr/lib/system/libdispatch.dylib
0x7fff2034a000 - 0x7fff20383ad7 libobjc.A.dylib (824) <551c4322-3921-3703-8cc6-1e8e143bb474> /usr/lib/libobjc.A.dylib
0x7fff2047c000 - 0x7fff204abfff libsystem_kernel.dylib (7195.141.2) /usr/lib/system/libsystem_kernel.dylib
0x7fff204ac000 - 0x7fff204b7fff libsystem_pthread.dylib (454.120.2) /usr/lib/system/libsystem_pthread.dylib
0x7fff204b8000 - 0x7fff204f3ff7 libdyld.dylib (852.2) <11007de4-abe1-3079-bf1c-4d0eada884dd> /usr/lib/system/libdyld.dylib
0x7fff2052a000 - 0x7fff209c73ef com.apple.CoreFoundation (6.9 - 1777.103) <08b48289-1c59-3259-8d49-f1fa51ed53d2> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
0x7fff212d9000 - 0x7fff216372ef com.apple.Foundation (6.9 - 1777.103) /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
0x7fff22d72000 - 0x7fff23abd35f com.apple.AppKit (6.9 - 2022.60.128) <8b44aaab-01a1-30a2-9b1b-cbbbe6dfb82a> /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
0x7fff24811000 - 0x7fff24cafff8 com.apple.CFNetwork (1240.0.4 - 1240.0.4) <9256a031-e247-364b-bd8c-6d701a07c85a> /System/Library/Frameworks/CFNetwork.framework/Versions/A/CFNetwork
0x7fff24d4d000 - 0x7fff250b2b97 com.apple.SkyLight (1.600.0) <5ce5d2b0-bda7-3f08-bd50-a37580ef6f03> /System/Library/PrivateFrameworks/SkyLight.framework/Versions/A/SkyLight
and
Impossible de déplacer « 01-Frezel - Fighting Nightmares.m4a » car vous ne disposez pas de l’autorisation nécessaire pour accéder à « MP3Tag ». (Error Domain=NSCocoaErrorDomain Code=513 "Impossible de déplacer « 01-Frezel - Fighting Nightmares.m4a » car vous ne disposez pas de l’autorisation nécessaire pour accéder à « MP3Tag »." UserInfo={NSSourceFilePathErrorKey=/Volumes/LaCie/MP3Tag/01-Frezel - Fighting Nightmares.m4a, NSUserStringVariant=(
Move
), NSDestinationFilePath=/Volumes/LaCie/MP3Tag/Fighting Nightmares EP test.m4a, NSFilePath=/Volumes/LaCie/MP3Tag/01-Frezel - Fighting Nightmares.m4a, NSUnderlyingError=0x60000177b2d0 {Error Domain=NSPOSIXErrorDomain Code=1 "Operation not permitted"}})
Hope it could help