Ahhh thanks, when I fsck /dev/sda1 I get this message and string of numbers below:
fsck from util-linux 2.38
fsck.fat 4.2 (2021-01-31)
There are differences between boot sector and its backup.
This is mostly harmless. Differences: (offset:original/backup)
1:63/58, 90:00/0e, 91:80/1f, 92:c0/be, 93:35/77, 94:51/7c, 95:03/ac
, 96:00/22, 97:00/c0, 98:00/74, 99:00/0b, 100:ff/56, 101:fa/b4, 102:90/0e
, 103:90/bb, 104:f6/07, 105:c2/00, 106:80/cd, 107:74/10, 108:05/5e
, 109:f6/eb, 110:c2/f0, 111:70/32, 112:74/e4, 113:02/cd, 114:b2/16
, 115:80/cd, 116:ea/19, 117:79/eb, 118:7c/fe, 119:00/54, 120:00/68
, 121:31/69, 122:c0/73, 123:8e/20, 124:d8/69, 125:8e/73, 126:d0/20
, 127:bc/6e, 128:00/6f, 129:20/74, 130:fb/20, 131:a0/61, 132:64/20
, 133:7c/62, 134:3c/6f, 135:ff/6f, 137:02/61, 138:88/62, 139:c2/6c
, 140:52/65, 141:bb/20, 142:17/64, 143:04/69, 144:f6/73, 145:07/6b
, 146:03/2e, 147:74/20, 148:06/20, 149:be/50, 150:88/6c, 151:7d/65
, 152:e8/61, 153:17/73, 154:01/65, 155:be/20, 156:05/69, 157:7c/6e
, 158:b4/73, 159:41/65, 160:bb/72, 161:aa/74, 162:55/20, 163:cd/61
, 164:13/20, 165:5a/62, 166:52/6f, 167:72/6f, 168:3d/74, 169:81/61
, 170:fb/62, 171:55/6c, 172:aa/65, 173:75/20, 174:37/66, 175:83/6c
, 176:e1/6f, 177:01/70, 178:74/70, 179:32/79, 180:31/20, 181:c0/61
, 182:89/6e, 183:44/64, 184:04/0d, 185:40/0a, 186:88/70, 187:44/72
, 188:ff/65, 189:89/73, 190:44/73, 191:02/20, 192:c7/61, 193:04/6e
, 194:10/79, 195:00/20, 196:66/6b, 197:8b/65, 198:1e/79, 199:5c/20
, 200:7c/74, 201:66/6f, 202:89/20, 203:5c/74, 204:08/72, 205:66/79
, 206:8b/20, 207:1e/61, 208:60/67, 209:7c/61, 210:66/69, 211:89/6e
, 212:5c/20, 213:0c/2e, 214:c7/2e, 215:44/2e, 216:06/20, 217:00/0d
, 218:70/0a, 219:b4/00, 220:42/00, 221:cd/00, 222:13/00, 223:72/00
, 224:05/00, 225:bb/00, 227:70/00, 228:eb/00, 229:76/00, 230:b4/00
, 231:08/00, 232:cd/00, 233:13/00, 234:73/00, 235:0d/00, 236:5a/00
, 237:84/00, 238:d2/00, 239:0f/00, 240:83/00, 241:d0/00, 243:be/00
, 244:93/00, 245:7d/00, 246:e9/00, 247:82/00, 249:66/00, 250:0f/00
, 251:b6/00, 252:c6/00, 253:88/00, 254:64/00, 255:ff/00, 256:40/00
, 257:66/00, 258:89/00, 259:44/00, 260:04/00, 261:0f/00, 262:b6/00
, 263:d1/00, 264:c1/00, 265:e2/00, 266:02/00, 267:88/00, 268:e8/00
, 269:88/00, 270:f4/00, 271:40/00, 272:89/00, 273:44/00, 274:08/00
, 275:0f/00, 276:b6/00, 277:c2/00, 278:c0/00, 279:e8/00, 280:02/00
, 281:66/00, 282:89/00, 283:04/00, 284:66/00, 285:a1/00, 286:60/00
, 287:7c/00, 288:66/00, 289:09/00, 290:c0/00, 291:75/00, 292:4e/00
, 293:66/00, 294:a1/00, 295:5c/00, 296:7c/00, 297:66/00, 298:31/00
, 299:d2/00, 300:66/00, 301:f7/00, 302:34/00, 303:88/00, 304:d1/00
, 305:31/00, 306:d2/00, 307:66/00, 308:f7/00, 309:74/00, 310:04/00
, 311:3b/00, 312:44/00, 313:08/00, 314:7d/00, 315:37/00, 316:fe/00
, 317:c1/00, 318:88/00, 319:c5/00, 320:30/00, 321:c0/00, 322:c1/00
, 323:e8/00, 324:02/00, 325:08/00, 326:c1/00, 327:88/00, 328:d0/00
, 329:5a/00, 330:88/00, 331:c6/00, 332:bb/00, 334:70/00, 335:8e/00
, 336:c3/00, 337:31/00, 338:db/00, 339:b8/00, 340:01/00, 341:02/00
, 342:cd/00, 343:13/00, 344:72/00, 345:1e/00, 346:8c/00, 347:c3/00
, 348:60/00, 349:1e/00, 350:b9/00, 352:01/00, 353:8e/00, 354:db/00
, 355:31/00, 356:f6/00, 357:bf/00, 359:80/00, 360:8e/00, 361:c6/00
, 362:fc/00, 363:f3/00, 364:a5/00, 365:1f/00, 366:61/00, 367:ff/00
, 368:26/00, 369:5a/00, 370:7c/00, 371:be/00, 372:8e/00, 373:7d/00
, 374:eb/00, 375:03/00, 376:be/00, 377:9d/00, 378:7d/00, 379:e8/00
, 380:34/00, 382:be/00, 383:a2/00, 384:7d/00, 385:e8/00, 386:2e/00
, 388:cd/00, 389:18/00, 390:eb/00, 391:fe/00, 392:47/00, 393:52/00
, 394:55/00, 395:42/00, 396:20/00, 398:47/00, 399:65/00, 400:6f/00
, 401:6d/00, 403:48/00, 404:61/00, 405:72/00, 406:64/00, 407:20/00
, 408:44/00, 409:69/00, 410:73/00, 411:6b/00, 413:52/00, 414:65/00
, 415:61/00, 416:64/00, 418:20/00, 419:45/00, 420:72/00, 421:72/00
, 422:6f/00, 423:72/00, 424:0d/00, 425:0a/00, 427:bb/00, 428:01/00
, 430:b4/00, 431:0e/00, 432:cd/00, 433:10/00, 434:ac/00, 435:3c/00
, 437:75/00, 438:f4/00, 439:c3/00
1) Copy original to backup
2) Copy backup to original
3) No action
[123?q]?
Meanwhile it says /dev/sda2 is fine:
fsck from util-linux 2.38
e2fsck 1.46.5 (30-Dec-2021)
/dev/sda2: clean, 3614016/31244288 files, 103942509/124948550 blocks