diff --git a/server/routes/device/removeAll.ts b/server/routes/device/removeAll.ts
index c017b61..899dcc1 100644
--- a/server/routes/device/removeAll.ts
+++ b/server/routes/device/removeAll.ts
@@ -163,7 +163,10 @@ export default function deviceRemoveAllRoutes(app: FastifyInstance, config: Serv
       )
 
       if (allUuids.length === 0) {
-        stream.error('No deploy history found. Cannot determine which templates are custom.')
+        stream.error(
+          'No deploy history found. Cannot determine which templates are custom.',
+          'Deploy templates first, or pull methods templates from the device to establish tracking.',
+        )
         return
       }
 
@@ -197,7 +200,10 @@ export default function deviceRemoveAllRoutes(app: FastifyInstance, config: Serv
       steps.push(`Saved backup: ${backupFilename} (${Object.keys(fileMap).length} files)`)
 
       if (!existsSync(backupPath)) {
-        stream.error('Backup verification failed — ZIP was not saved')
+        stream.error(
+          'Backup verification failed — ZIP was not saved',
+          'Check available disk space on the server. The backup must be saved before templates can be removed.',
+        )
         return
       }
 
diff --git a/src/components/device/DeviceBackupsCard.tsx b/src/components/device/DeviceBackupsCard.tsx
index f4d9ce6..258ef68 100644
--- a/src/components/device/DeviceBackupsCard.tsx
+++ b/src/components/device/DeviceBackupsCard.tsx
@@ -1,4 +1,5 @@
 import { useState, useEffect, useRef, useCallback } from 'react'
+import { ErrorDetails } from './ErrorDetails'
 
 interface Props {
   deviceId: string | null
@@ -364,10 +365,14 @@ export function DeviceBackupsCard({ deviceId, deviceName, configured, onStatus:
             </div>
           )}
           {restoreResult && restoreResult.type === 'error' && (
-            <div className="backup-inline-error">
-              {restoreResult.message}
+            <ErrorDetails
+              error={restoreResult.message}
+              details={restoreResult.details}
+              operationName="restore-backup"
+              className="device-op-result error"
+            >
               <button className="backup-inline-dismiss" onClick={() => setRestoreResult(null)}>&times;</button>
-            </div>
+            </ErrorDetails>
           )}
 
           {/* Restore preview panel */}
diff --git a/src/components/device/DeviceConnectionCard.tsx b/src/components/device/DeviceConnectionCard.tsx
index 1040eda..d402fa3 100644
--- a/src/components/device/DeviceConnectionCard.tsx
+++ b/src/components/device/DeviceConnectionCard.tsx
@@ -235,6 +235,7 @@ export function DeviceConnectionCard({ devicesState }: Props) {
                 error={testResult.error!}
                 hint={testResult.hint}
                 rawError={testResult.rawError}
+                operationName="test-connection"
                 deviceModel={activeDevice?.deviceModel}
                 firmwareVersion={activeDevice?.firmwareVersion}
                 className="device-error"
@@ -327,6 +328,7 @@ export function DeviceConnectionCard({ devicesState }: Props) {
                 error={keyResult.error!}
                 hint={keyResult.hint}
                 rawError={keyResult.rawError}
+                operationName="setup-ssh-keys"
                 deviceModel={activeDevice?.deviceModel}
                 firmwareVersion={activeDevice?.firmwareVersion}
                 className="device-error"
@@ -465,6 +467,7 @@ export function DeviceConnectionCard({ devicesState }: Props) {
                 error={testResult.error!}
                 hint={testResult.hint}
                 rawError={testResult.rawError}
+                operationName="test-connection"
                 deviceModel={activeDevice?.deviceModel}
                 firmwareVersion={activeDevice?.firmwareVersion}
                 className="device-error"
diff --git a/src/components/device/DeviceOpComponents.tsx b/src/components/device/DeviceOpComponents.tsx
index 8943ad9..d7bfe6c 100644
--- a/src/components/device/DeviceOpComponents.tsx
+++ b/src/components/device/DeviceOpComponents.tsx
@@ -40,6 +40,7 @@ export function OpButton({
   variant = 'primary',
   disabled = false,
   title,
+  operationName,
   deviceModel,
   firmwareVersion,
 }: {
@@ -49,6 +50,7 @@ export function OpButton({
   variant?: 'primary' | 'secondary' | 'danger'
   disabled?: boolean
   title?: string
+  operationName?: string
   deviceModel?: string
   firmwareVersion?: string
 }) {
@@ -67,11 +69,16 @@ export function OpButton({
         <ProgressBar progress={op.progress} label={loadingLabel} />
       )}
       {op.result && !op.result.ok && (
-        <ErrorDetails error={op.result.error} hint={op.result.hint} rawError={op.result.rawError} deviceModel={deviceModel} firmwareVersion={firmwareVersion} />
+        <ErrorDetails error={op.result.error} hint={op.result.hint} rawError={op.result.rawError} details={op.result.details} operationName={operationName} deviceModel={deviceModel} firmwareVersion={firmwareVersion} />
       )}
       {op.result?.ok && (
         <div className="device-op-result">
           <p style={{ margin: 0 }}>{op.result.message}</p>
+          {op.result.warnings && op.result.warnings.length > 0 && (
+            <ul className="device-op-warnings">
+              {op.result.warnings.map((w, i) => <li key={i}>{w}</li>)}
+            </ul>
+          )}
         </div>
       )}
     </div>
diff --git a/src/components/device/DeviceSyncCard.tsx b/src/components/device/DeviceSyncCard.tsx
index 71bf5cb..548fa44 100644
--- a/src/components/device/DeviceSyncCard.tsx
+++ b/src/components/device/DeviceSyncCard.tsx
@@ -315,7 +315,7 @@ function SyncStatusSection({ syncStatus, autoRefreshed, deviceModel, firmwareVer
 
       {error && (
         <div style={{ marginTop: 8 }}>
-          <ErrorDetails error={error.message} hint={error.hint} rawError={error.rawError} deviceModel={deviceModel} firmwareVersion={firmwareVersion} />
+          <ErrorDetails error={error.message} hint={error.hint} rawError={error.rawError} operationName="sync-status" deviceModel={deviceModel} firmwareVersion={firmwareVersion} />
         </div>
       )}
 
@@ -607,6 +607,7 @@ export function DeviceSyncCard({ deviceId, deviceName, configured, deviceModel,
                   op={pullMethods}
                   disabled={anyOpRunning}
                   title={`Download methods templates (official + custom) from ${deviceName}`}
+                  operationName="pull-methods"
                   deviceModel={deviceModel}
                   firmwareVersion={firmwareVersion}
                 />
@@ -617,6 +618,7 @@ export function DeviceSyncCard({ deviceId, deviceName, configured, deviceModel,
                   variant="secondary"
                   disabled={anyOpRunning}
                   title={`Download classic templates from ${deviceName}`}
+                  operationName="pull-classic"
                   deviceModel={deviceModel}
                   firmwareVersion={firmwareVersion}
                 />
@@ -640,6 +642,7 @@ export function DeviceSyncCard({ deviceId, deviceName, configured, deviceModel,
                   title={selective.showSelector && selective.selectedIds.size === 0
                     ? 'Select at least one template to deploy'
                     : `Build and push templates to ${deviceName} in methods format — syncs across paired devices`}
+                  operationName="deploy-methods"
                   deviceModel={deviceModel}
                   firmwareVersion={firmwareVersion}
                 />
@@ -650,6 +653,7 @@ export function DeviceSyncCard({ deviceId, deviceName, configured, deviceModel,
                   variant="secondary"
                   disabled={anyOpRunning}
                   title={`Push classic templates to ${deviceName} — single device only, wiped on firmware updates`}
+                  operationName="deploy-classic"
                   deviceModel={deviceModel}
                   firmwareVersion={firmwareVersion}
                 />
@@ -673,6 +677,7 @@ export function DeviceSyncCard({ deviceId, deviceName, configured, deviceModel,
                   variant="danger"
                   disabled={anyOpRunning}
                   title={`Revert ${deviceName} to the state before your last deploy`}
+                  operationName="rollback-methods"
                   deviceModel={deviceModel}
                   firmwareVersion={firmwareVersion}
                 />
@@ -683,6 +688,7 @@ export function DeviceSyncCard({ deviceId, deviceName, configured, deviceModel,
                   variant="danger"
                   disabled={anyOpRunning}
                   title={`Restore ${deviceName} to its pre-app state`}
+                  operationName="rollback-original"
                   deviceModel={deviceModel}
                   firmwareVersion={firmwareVersion}
                 />
@@ -693,6 +699,7 @@ export function DeviceSyncCard({ deviceId, deviceName, configured, deviceModel,
                   variant="danger"
                   disabled={anyOpRunning}
                   title={`Restore ${deviceName} from the most recent classic template backup`}
+                  operationName="rollback-classic"
                   deviceModel={deviceModel}
                   firmwareVersion={firmwareVersion}
                 />
@@ -785,7 +792,7 @@ export function DeviceSyncCard({ deviceId, deviceName, configured, deviceModel,
 
               {removeAll.phase === 'error' && removeAll.errorInfo && (
                 <div>
-                  <ErrorDetails error={removeAll.errorInfo.message} hint={removeAll.errorInfo.hint} rawError={removeAll.errorInfo.rawError} deviceModel={deviceModel} firmwareVersion={firmwareVersion}>
+                  <ErrorDetails error={removeAll.errorInfo.message} hint={removeAll.errorInfo.hint} rawError={removeAll.errorInfo.rawError} operationName="remove-all" deviceModel={deviceModel} firmwareVersion={firmwareVersion}>
                     <button
                       className="device-card-btn device-card-btn-secondary"
                       onClick={removeAll.reset}
diff --git a/src/components/device/deviceOpHelpers.ts b/src/components/device/deviceOpHelpers.ts
index ef3efcb..466e425 100644
--- a/src/components/device/deviceOpHelpers.ts
+++ b/src/components/device/deviceOpHelpers.ts
@@ -98,12 +98,13 @@ export function useDeviceOp(url: string, options?: { confirmMsg?: string; onSucc
       const count = data.count as number | undefined
       const message = data.message as string | undefined
       const restoredFrom = data.restoredFrom as string | undefined
+      const warnings = data.warnings as string[] | undefined
       const msg =
         message ??
         ((steps ? steps.join(' \u2192 ') : '') ||
         (count !== undefined ? `Pulled ${count} templates` : '') ||
         (restoredFrom ? `Restored from ${restoredFrom}` : 'Done'))
-      setResult({ ok: true, message: msg, steps })
+      setResult({ ok: true, message: msg, steps, warnings })
       options?.onSuccess?.()
     } catch (e) {
       if (e && typeof e === 'object' && 'error' in e) {
diff --git a/src/pages/DevicePage.css b/src/pages/DevicePage.css
index d926657..5a00699 100644
--- a/src/pages/DevicePage.css
+++ b/src/pages/DevicePage.css
@@ -332,6 +332,18 @@
   margin: 6px 0 0;
 }
 
+.device-op-warnings {
+  font-size: 12px;
+  color: var(--color-warning-text, var(--color-text-secondary));
+  padding-left: 20px;
+  margin: 6px 0 0;
+  list-style: disc;
+}
+
+.device-op-warnings li {
+  margin-bottom: 2px;
+}
+
 /* ── Backup list ───────────────────────────────────────────────────── */
 
 .device-backup-list {